feat(mirrors): add selective snapshot sync to mirror repositories (#755)

* feat(mirrors): add selective snapshot sync to mirror repositories Allow users to sync missing snapshots from the source repository to a mirror. A new sync button per mirror opens a dialog showing which snapshots are missing, with checkboxes to select which ones to copy. - Add GET /:shortId/mirrors/:mirrorShortId/status endpoint to compare snapshots between source and mirror repositories - Add POST /:shortId/mirrors/:mirrorShortId/sync endpoint accepting selected snapshotIds in the request body - Extend restic copy command to accept multiple snapshotIds - Add sync preview dialog with snapshot selection to the frontend * refactor: stylistic changes --------- Co-authored-by: Nicolas Meienberger <github@thisprops.com>
2026-05-19 06:03:01 -04:00 · 2026-04-16 21:28:48 +02:00
parent 497fa474a7
commit d2f65716fe
15 changed files with 1011 additions and 22 deletions
--- a/app/client/api-client/@tanstack/react-query.gen.ts
+++ b/app/client/api-client/@tanstack/react-query.gen.ts
@@ -4,8 +4,8 @@
 import { type DefaultError, type InfiniteData, infiniteQueryOptions, queryOptions, type UseMutationOptions } from '@tanstack/react-query';

 import { client } from '../client.gen';
-import { browseFilesystem, cancelDoctor, createBackupSchedule, createNotificationDestination, createRepository, createVolume, deleteBackupSchedule, deleteNotificationDestination, deleteRepository, deleteSnapshot, deleteSnapshots, deleteSsoInvitation, deleteSsoProvider, deleteUserAccount, deleteVolume, downloadResticPassword, dumpSnapshot, getAdminUsers, getBackupProgress, getBackupSchedule, getBackupScheduleForVolume, getDevPanel, getMirrorCompatibility, getNotificationDestination, getOrgMembers, getPublicSsoProviders, getRegistrationStatus, getRepository, getRepositoryStats, getScheduleMirrors, getScheduleNotifications, getSnapshotDetails, getSsoSettings, getStatus, getSystemInfo, getUpdates, getUserDeletionImpact, getVolume, healthCheckVolume, listBackupSchedules, listFiles, listNotificationDestinations, listRcloneRemotes, listRepositories, listSnapshotFiles, listSnapshots, listVolumes, mountVolume, type Options, refreshRepositoryStats, refreshSnapshots, removeOrgMember, reorderBackupSchedules, restoreSnapshot, runBackupNow, runForget, setRegistrationStatus, startDoctor, stopBackup, tagSnapshots, testConnection, testNotificationDestination, unlockRepository, unmountVolume, updateBackupSchedule, updateMemberRole, updateNotificationDestination, updateRepository, updateScheduleMirrors, updateScheduleNotifications, updateSsoProviderAutoLinking, updateVolume } from '../sdk.gen';
-import type { BrowseFilesystemData, BrowseFilesystemResponse, CancelDoctorData, CancelDoctorResponse, CreateBackupScheduleData, CreateBackupScheduleResponse, CreateNotificationDestinationData, CreateNotificationDestinationResponse, CreateRepositoryData, CreateRepositoryResponse, CreateVolumeData, CreateVolumeResponse, DeleteBackupScheduleData, DeleteBackupScheduleResponse, DeleteNotificationDestinationData, DeleteNotificationDestinationResponse, DeleteRepositoryData, DeleteRepositoryResponse, DeleteSnapshotData, DeleteSnapshotResponse, DeleteSnapshotsData, DeleteSnapshotsResponse, DeleteSsoInvitationData, DeleteSsoProviderData, DeleteUserAccountData, DeleteVolumeData, DeleteVolumeResponse, DownloadResticPasswordData, DownloadResticPasswordResponse, DumpSnapshotData, DumpSnapshotResponse, GetAdminUsersData, GetAdminUsersResponse, GetBackupProgressData, GetBackupProgressResponse, GetBackupScheduleData, GetBackupScheduleForVolumeData, GetBackupScheduleForVolumeResponse, GetBackupScheduleResponse, GetDevPanelData, GetDevPanelResponse, GetMirrorCompatibilityData, GetMirrorCompatibilityResponse, GetNotificationDestinationData, GetNotificationDestinationResponse, GetOrgMembersData, GetOrgMembersResponse, GetPublicSsoProvidersData, GetPublicSsoProvidersResponse, GetRegistrationStatusData, GetRegistrationStatusResponse, GetRepositoryData, GetRepositoryResponse, GetRepositoryStatsData, GetRepositoryStatsResponse, GetScheduleMirrorsData, GetScheduleMirrorsResponse, GetScheduleNotificationsData, GetScheduleNotificationsResponse, GetSnapshotDetailsData, GetSnapshotDetailsResponse, GetSsoSettingsData, GetSsoSettingsResponse, GetStatusData, GetStatusResponse, GetSystemInfoData, GetSystemInfoResponse, GetUpdatesData, GetUpdatesResponse, GetUserDeletionImpactData, GetUserDeletionImpactResponse, GetVolumeData, GetVolumeResponse, HealthCheckVolumeData, HealthCheckVolumeResponse, ListBackupSchedulesData, ListBackupSchedulesResponse, ListFilesData, ListFilesResponse, ListNotificationDestinationsData, ListNotificationDestinationsResponse, ListRcloneRemotesData, ListRcloneRemotesResponse, ListRepositoriesData, ListRepositoriesResponse, ListSnapshotFilesData, ListSnapshotFilesResponse, ListSnapshotsData, ListSnapshotsResponse, ListVolumesData, ListVolumesResponse, MountVolumeData, MountVolumeResponse, RefreshRepositoryStatsData, RefreshRepositoryStatsResponse, RefreshSnapshotsData, RefreshSnapshotsResponse, RemoveOrgMemberData, ReorderBackupSchedulesData, ReorderBackupSchedulesResponse, RestoreSnapshotData, RestoreSnapshotResponse, RunBackupNowData, RunBackupNowResponse, RunForgetData, RunForgetResponse, SetRegistrationStatusData, SetRegistrationStatusResponse, StartDoctorData, StartDoctorResponse, StopBackupData, StopBackupResponse, TagSnapshotsData, TagSnapshotsResponse, TestConnectionData, TestConnectionResponse, TestNotificationDestinationData, TestNotificationDestinationResponse, UnlockRepositoryData, UnlockRepositoryResponse, UnmountVolumeData, UnmountVolumeResponse, UpdateBackupScheduleData, UpdateBackupScheduleResponse, UpdateMemberRoleData, UpdateNotificationDestinationData, UpdateNotificationDestinationResponse, UpdateRepositoryData, UpdateRepositoryResponse, UpdateScheduleMirrorsData, UpdateScheduleMirrorsResponse, UpdateScheduleNotificationsData, UpdateScheduleNotificationsResponse, UpdateSsoProviderAutoLinkingData, UpdateVolumeData, UpdateVolumeResponse } from '../types.gen';
+import { browseFilesystem, cancelDoctor, createBackupSchedule, createNotificationDestination, createRepository, createVolume, deleteBackupSchedule, deleteNotificationDestination, deleteRepository, deleteSnapshot, deleteSnapshots, deleteSsoInvitation, deleteSsoProvider, deleteUserAccount, deleteVolume, downloadResticPassword, dumpSnapshot, getAdminUsers, getBackupProgress, getBackupSchedule, getBackupScheduleForVolume, getDevPanel, getMirrorCompatibility, getMirrorSyncStatus, getNotificationDestination, getOrgMembers, getPublicSsoProviders, getRegistrationStatus, getRepository, getRepositoryStats, getScheduleMirrors, getScheduleNotifications, getSnapshotDetails, getSsoSettings, getStatus, getSystemInfo, getUpdates, getUserDeletionImpact, getVolume, healthCheckVolume, listBackupSchedules, listFiles, listNotificationDestinations, listRcloneRemotes, listRepositories, listSnapshotFiles, listSnapshots, listVolumes, mountVolume, type Options, refreshRepositoryStats, refreshSnapshots, removeOrgMember, reorderBackupSchedules, restoreSnapshot, runBackupNow, runForget, setRegistrationStatus, startDoctor, stopBackup, syncMirror, tagSnapshots, testConnection, testNotificationDestination, unlockRepository, unmountVolume, updateBackupSchedule, updateMemberRole, updateNotificationDestination, updateRepository, updateScheduleMirrors, updateScheduleNotifications, updateSsoProviderAutoLinking, updateVolume } from '../sdk.gen';
+import type { BrowseFilesystemData, BrowseFilesystemResponse, CancelDoctorData, CancelDoctorResponse, CreateBackupScheduleData, CreateBackupScheduleResponse, CreateNotificationDestinationData, CreateNotificationDestinationResponse, CreateRepositoryData, CreateRepositoryResponse, CreateVolumeData, CreateVolumeResponse, DeleteBackupScheduleData, DeleteBackupScheduleResponse, DeleteNotificationDestinationData, DeleteNotificationDestinationResponse, DeleteRepositoryData, DeleteRepositoryResponse, DeleteSnapshotData, DeleteSnapshotResponse, DeleteSnapshotsData, DeleteSnapshotsResponse, DeleteSsoInvitationData, DeleteSsoProviderData, DeleteUserAccountData, DeleteVolumeData, DeleteVolumeResponse, DownloadResticPasswordData, DownloadResticPasswordResponse, DumpSnapshotData, DumpSnapshotResponse, GetAdminUsersData, GetAdminUsersResponse, GetBackupProgressData, GetBackupProgressResponse, GetBackupScheduleData, GetBackupScheduleForVolumeData, GetBackupScheduleForVolumeResponse, GetBackupScheduleResponse, GetDevPanelData, GetDevPanelResponse, GetMirrorCompatibilityData, GetMirrorCompatibilityResponse, GetMirrorSyncStatusData, GetMirrorSyncStatusResponse, GetNotificationDestinationData, GetNotificationDestinationResponse, GetOrgMembersData, GetOrgMembersResponse, GetPublicSsoProvidersData, GetPublicSsoProvidersResponse, GetRegistrationStatusData, GetRegistrationStatusResponse, GetRepositoryData, GetRepositoryResponse, GetRepositoryStatsData, GetRepositoryStatsResponse, GetScheduleMirrorsData, GetScheduleMirrorsResponse, GetScheduleNotificationsData, GetScheduleNotificationsResponse, GetSnapshotDetailsData, GetSnapshotDetailsResponse, GetSsoSettingsData, GetSsoSettingsResponse, GetStatusData, GetStatusResponse, GetSystemInfoData, GetSystemInfoResponse, GetUpdatesData, GetUpdatesResponse, GetUserDeletionImpactData, GetUserDeletionImpactResponse, GetVolumeData, GetVolumeResponse, HealthCheckVolumeData, HealthCheckVolumeResponse, ListBackupSchedulesData, ListBackupSchedulesResponse, ListFilesData, ListFilesResponse, ListNotificationDestinationsData, ListNotificationDestinationsResponse, ListRcloneRemotesData, ListRcloneRemotesResponse, ListRepositoriesData, ListRepositoriesResponse, ListSnapshotFilesData, ListSnapshotFilesResponse, ListSnapshotsData, ListSnapshotsResponse, ListVolumesData, ListVolumesResponse, MountVolumeData, MountVolumeResponse, RefreshRepositoryStatsData, RefreshRepositoryStatsResponse, RefreshSnapshotsData, RefreshSnapshotsResponse, RemoveOrgMemberData, ReorderBackupSchedulesData, ReorderBackupSchedulesResponse, RestoreSnapshotData, RestoreSnapshotResponse, RunBackupNowData, RunBackupNowResponse, RunForgetData, RunForgetResponse, SetRegistrationStatusData, SetRegistrationStatusResponse, StartDoctorData, StartDoctorResponse, StopBackupData, StopBackupResponse, SyncMirrorData, SyncMirrorResponse, TagSnapshotsData, TagSnapshotsResponse, TestConnectionData, TestConnectionResponse, TestNotificationDestinationData, TestNotificationDestinationResponse, UnlockRepositoryData, UnlockRepositoryResponse, UnmountVolumeData, UnmountVolumeResponse, UpdateBackupScheduleData, UpdateBackupScheduleResponse, UpdateMemberRoleData, UpdateNotificationDestinationData, UpdateNotificationDestinationResponse, UpdateRepositoryData, UpdateRepositoryResponse, UpdateScheduleMirrorsData, UpdateScheduleMirrorsResponse, UpdateScheduleNotificationsData, UpdateScheduleNotificationsResponse, UpdateSsoProviderAutoLinkingData, UpdateVolumeData, UpdateVolumeResponse } from '../types.gen';

 export type QueryKey<TOptions extends Options> = [
    Pick<TOptions, 'baseUrl' | 'body' | 'headers' | 'path' | 'query'> & {
@@ -1098,6 +1098,41 @@ export const updateScheduleMirrorsMutation = (options?: Partial<Options<UpdateSc
    return mutationOptions;
 };

+export const getMirrorSyncStatusQueryKey = (options: Options<GetMirrorSyncStatusData>) => createQueryKey('getMirrorSyncStatus', options);
+
+/**
+ * Get sync status for a specific mirror, including missing snapshots
+ */
+export const getMirrorSyncStatusOptions = (options: Options<GetMirrorSyncStatusData>) => queryOptions<GetMirrorSyncStatusResponse, DefaultError, GetMirrorSyncStatusResponse, ReturnType<typeof getMirrorSyncStatusQueryKey>>({
+    queryFn: async ({ queryKey, signal }) => {
+        const { data } = await getMirrorSyncStatus({
+            ...options,
+            ...queryKey[0],
+            signal,
+            throwOnError: true
+        });
+        return data;
+    },
+    queryKey: getMirrorSyncStatusQueryKey(options)
+});
+
+/**
+ * Sync selected snapshots to a specific mirror repository
+ */
+export const syncMirrorMutation = (options?: Partial<Options<SyncMirrorData>>): UseMutationOptions<SyncMirrorResponse, DefaultError, Options<SyncMirrorData>> => {
+    const mutationOptions: UseMutationOptions<SyncMirrorResponse, DefaultError, Options<SyncMirrorData>> = {
+        mutationFn: async (fnOptions) => {
+            const { data } = await syncMirror({
+                ...options,
+                ...fnOptions,
+                throwOnError: true
+            });
+            return data;
+        }
+    };
+    return mutationOptions;
+};
+
 export const getMirrorCompatibilityQueryKey = (options: Options<GetMirrorCompatibilityData>) => createQueryKey('getMirrorCompatibility', options);

 /**
--- a/app/client/api-client/index.ts
+++ b/app/client/api-client/index.ts
@@ -26,6 +26,7 @@ export {
 	getBackupScheduleForVolume,
 	getDevPanel,
 	getMirrorCompatibility,
+	getMirrorSyncStatus,
 	getNotificationDestination,
 	getOrgMembers,
 	getPublicSsoProviders,
@@ -62,6 +63,7 @@ export {
 	setRegistrationStatus,
 	startDoctor,
 	stopBackup,
+	syncMirror,
 	tagSnapshots,
 	testConnection,
 	testNotificationDestination,
@@ -153,6 +155,9 @@ export type {
 	GetMirrorCompatibilityData,
 	GetMirrorCompatibilityResponse,
 	GetMirrorCompatibilityResponses,
+	GetMirrorSyncStatusData,
+	GetMirrorSyncStatusResponse,
+	GetMirrorSyncStatusResponses,
 	GetNotificationDestinationData,
 	GetNotificationDestinationErrors,
 	GetNotificationDestinationResponse,
@@ -263,6 +268,10 @@ export type {
 	StopBackupErrors,
 	StopBackupResponse,
 	StopBackupResponses,
+	SyncMirrorData,
+	SyncMirrorErrors,
+	SyncMirrorResponse,
+	SyncMirrorResponses,
 	TagSnapshotsData,
 	TagSnapshotsResponse,
 	TagSnapshotsResponses,
--- a/app/client/api-client/sdk.gen.ts
+++ b/app/client/api-client/sdk.gen.ts
@@ -3,7 +3,7 @@

 import type { Client, Options as Options2, TDataShape } from './client';
 import { client } from './client.gen';
-import type { BrowseFilesystemData, BrowseFilesystemResponses, CancelDoctorData, CancelDoctorErrors, CancelDoctorResponses, CreateBackupScheduleData, CreateBackupScheduleResponses, CreateNotificationDestinationData, CreateNotificationDestinationResponses, CreateRepositoryData, CreateRepositoryResponses, CreateVolumeData, CreateVolumeResponses, DeleteBackupScheduleData, DeleteBackupScheduleResponses, DeleteNotificationDestinationData, DeleteNotificationDestinationErrors, DeleteNotificationDestinationResponses, DeleteRepositoryData, DeleteRepositoryResponses, DeleteSnapshotData, DeleteSnapshotResponses, DeleteSnapshotsData, DeleteSnapshotsResponses, DeleteSsoInvitationData, DeleteSsoInvitationErrors, DeleteSsoInvitationResponses, DeleteSsoProviderData, DeleteSsoProviderErrors, DeleteSsoProviderResponses, DeleteUserAccountData, DeleteUserAccountErrors, DeleteUserAccountResponses, DeleteVolumeData, DeleteVolumeResponses, DevPanelExecData, DevPanelExecErrors, DevPanelExecResponse, DevPanelExecResponses, DownloadResticPasswordData, DownloadResticPasswordResponses, DumpSnapshotData, DumpSnapshotResponses, GetAdminUsersData, GetAdminUsersResponses, GetBackupProgressData, GetBackupProgressResponses, GetBackupScheduleData, GetBackupScheduleForVolumeData, GetBackupScheduleForVolumeResponses, GetBackupScheduleResponses, GetDevPanelData, GetDevPanelResponses, GetMirrorCompatibilityData, GetMirrorCompatibilityResponses, GetNotificationDestinationData, GetNotificationDestinationErrors, GetNotificationDestinationResponses, GetOrgMembersData, GetOrgMembersResponses, GetPublicSsoProvidersData, GetPublicSsoProvidersResponses, GetRegistrationStatusData, GetRegistrationStatusResponses, GetRepositoryData, GetRepositoryResponses, GetRepositoryStatsData, GetRepositoryStatsResponses, GetScheduleMirrorsData, GetScheduleMirrorsResponses, GetScheduleNotificationsData, GetScheduleNotificationsResponses, GetSnapshotDetailsData, GetSnapshotDetailsResponses, GetSsoSettingsData, GetSsoSettingsResponses, GetStatusData, GetStatusResponses, GetSystemInfoData, GetSystemInfoResponses, GetUpdatesData, GetUpdatesResponses, GetUserDeletionImpactData, GetUserDeletionImpactResponses, GetVolumeData, GetVolumeErrors, GetVolumeResponses, HealthCheckVolumeData, HealthCheckVolumeErrors, HealthCheckVolumeResponses, ListBackupSchedulesData, ListBackupSchedulesResponses, ListFilesData, ListFilesResponses, ListNotificationDestinationsData, ListNotificationDestinationsResponses, ListRcloneRemotesData, ListRcloneRemotesResponses, ListRepositoriesData, ListRepositoriesResponses, ListSnapshotFilesData, ListSnapshotFilesResponses, ListSnapshotsData, ListSnapshotsResponses, ListVolumesData, ListVolumesResponses, MountVolumeData, MountVolumeResponses, RefreshRepositoryStatsData, RefreshRepositoryStatsResponses, RefreshSnapshotsData, RefreshSnapshotsResponses, RemoveOrgMemberData, RemoveOrgMemberErrors, RemoveOrgMemberResponses, ReorderBackupSchedulesData, ReorderBackupSchedulesResponses, RestoreSnapshotData, RestoreSnapshotResponses, RunBackupNowData, RunBackupNowResponses, RunForgetData, RunForgetResponses, SetRegistrationStatusData, SetRegistrationStatusResponses, StartDoctorData, StartDoctorErrors, StartDoctorResponses, StopBackupData, StopBackupErrors, StopBackupResponses, TagSnapshotsData, TagSnapshotsResponses, TestConnectionData, TestConnectionResponses, TestNotificationDestinationData, TestNotificationDestinationErrors, TestNotificationDestinationResponses, UnlockRepositoryData, UnlockRepositoryResponses, UnmountVolumeData, UnmountVolumeResponses, UpdateBackupScheduleData, UpdateBackupScheduleResponses, UpdateMemberRoleData, UpdateMemberRoleErrors, UpdateMemberRoleResponses, UpdateNotificationDestinationData, UpdateNotificationDestinationErrors, UpdateNotificationDestinationResponses, UpdateRepositoryData, UpdateRepositoryErrors, UpdateRepositoryResponses, UpdateScheduleMirrorsData, UpdateScheduleMirrorsResponses, UpdateScheduleNotificationsData, UpdateScheduleNotificationsResponses, UpdateSsoProviderAutoLinkingData, UpdateSsoProviderAutoLinkingErrors, UpdateSsoProviderAutoLinkingResponses, UpdateVolumeData, UpdateVolumeErrors, UpdateVolumeResponses } from './types.gen';
+import type { BrowseFilesystemData, BrowseFilesystemResponses, CancelDoctorData, CancelDoctorErrors, CancelDoctorResponses, CreateBackupScheduleData, CreateBackupScheduleResponses, CreateNotificationDestinationData, CreateNotificationDestinationResponses, CreateRepositoryData, CreateRepositoryResponses, CreateVolumeData, CreateVolumeResponses, DeleteBackupScheduleData, DeleteBackupScheduleResponses, DeleteNotificationDestinationData, DeleteNotificationDestinationErrors, DeleteNotificationDestinationResponses, DeleteRepositoryData, DeleteRepositoryResponses, DeleteSnapshotData, DeleteSnapshotResponses, DeleteSnapshotsData, DeleteSnapshotsResponses, DeleteSsoInvitationData, DeleteSsoInvitationErrors, DeleteSsoInvitationResponses, DeleteSsoProviderData, DeleteSsoProviderErrors, DeleteSsoProviderResponses, DeleteUserAccountData, DeleteUserAccountErrors, DeleteUserAccountResponses, DeleteVolumeData, DeleteVolumeResponses, DevPanelExecData, DevPanelExecErrors, DevPanelExecResponse, DevPanelExecResponses, DownloadResticPasswordData, DownloadResticPasswordResponses, DumpSnapshotData, DumpSnapshotResponses, GetAdminUsersData, GetAdminUsersResponses, GetBackupProgressData, GetBackupProgressResponses, GetBackupScheduleData, GetBackupScheduleForVolumeData, GetBackupScheduleForVolumeResponses, GetBackupScheduleResponses, GetDevPanelData, GetDevPanelResponses, GetMirrorCompatibilityData, GetMirrorCompatibilityResponses, GetMirrorSyncStatusData, GetMirrorSyncStatusResponses, GetNotificationDestinationData, GetNotificationDestinationErrors, GetNotificationDestinationResponses, GetOrgMembersData, GetOrgMembersResponses, GetPublicSsoProvidersData, GetPublicSsoProvidersResponses, GetRegistrationStatusData, GetRegistrationStatusResponses, GetRepositoryData, GetRepositoryResponses, GetRepositoryStatsData, GetRepositoryStatsResponses, GetScheduleMirrorsData, GetScheduleMirrorsResponses, GetScheduleNotificationsData, GetScheduleNotificationsResponses, GetSnapshotDetailsData, GetSnapshotDetailsResponses, GetSsoSettingsData, GetSsoSettingsResponses, GetStatusData, GetStatusResponses, GetSystemInfoData, GetSystemInfoResponses, GetUpdatesData, GetUpdatesResponses, GetUserDeletionImpactData, GetUserDeletionImpactResponses, GetVolumeData, GetVolumeErrors, GetVolumeResponses, HealthCheckVolumeData, HealthCheckVolumeErrors, HealthCheckVolumeResponses, ListBackupSchedulesData, ListBackupSchedulesResponses, ListFilesData, ListFilesResponses, ListNotificationDestinationsData, ListNotificationDestinationsResponses, ListRcloneRemotesData, ListRcloneRemotesResponses, ListRepositoriesData, ListRepositoriesResponses, ListSnapshotFilesData, ListSnapshotFilesResponses, ListSnapshotsData, ListSnapshotsResponses, ListVolumesData, ListVolumesResponses, MountVolumeData, MountVolumeResponses, RefreshRepositoryStatsData, RefreshRepositoryStatsResponses, RefreshSnapshotsData, RefreshSnapshotsResponses, RemoveOrgMemberData, RemoveOrgMemberErrors, RemoveOrgMemberResponses, ReorderBackupSchedulesData, ReorderBackupSchedulesResponses, RestoreSnapshotData, RestoreSnapshotResponses, RunBackupNowData, RunBackupNowResponses, RunForgetData, RunForgetResponses, SetRegistrationStatusData, SetRegistrationStatusResponses, StartDoctorData, StartDoctorErrors, StartDoctorResponses, StopBackupData, StopBackupErrors, StopBackupResponses, SyncMirrorData, SyncMirrorErrors, SyncMirrorResponses, TagSnapshotsData, TagSnapshotsResponses, TestConnectionData, TestConnectionResponses, TestNotificationDestinationData, TestNotificationDestinationErrors, TestNotificationDestinationResponses, UnlockRepositoryData, UnlockRepositoryResponses, UnmountVolumeData, UnmountVolumeResponses, UpdateBackupScheduleData, UpdateBackupScheduleResponses, UpdateMemberRoleData, UpdateMemberRoleErrors, UpdateMemberRoleResponses, UpdateNotificationDestinationData, UpdateNotificationDestinationErrors, UpdateNotificationDestinationResponses, UpdateRepositoryData, UpdateRepositoryErrors, UpdateRepositoryResponses, UpdateScheduleMirrorsData, UpdateScheduleMirrorsResponses, UpdateScheduleNotificationsData, UpdateScheduleNotificationsResponses, UpdateSsoProviderAutoLinkingData, UpdateSsoProviderAutoLinkingErrors, UpdateSsoProviderAutoLinkingResponses, UpdateVolumeData, UpdateVolumeErrors, UpdateVolumeResponses } from './types.gen';

 export type Options<TData extends TDataShape = TDataShape, ThrowOnError extends boolean = boolean, TResponse = unknown> = Options2<TData, ThrowOnError, TResponse> & {
    /**
@@ -409,6 +409,23 @@ export const updateScheduleMirrors = <ThrowOnError extends boolean = false>(opti
    }
 });

+/**
+ * Get sync status for a specific mirror, including missing snapshots
+ */
+export const getMirrorSyncStatus = <ThrowOnError extends boolean = false>(options: Options<GetMirrorSyncStatusData, ThrowOnError>) => (options.client ?? client).get<GetMirrorSyncStatusResponses, unknown, ThrowOnError>({ url: '/api/v1/backups/{shortId}/mirrors/{mirrorShortId}/status', ...options });
+
+/**
+ * Sync selected snapshots to a specific mirror repository
+ */
+export const syncMirror = <ThrowOnError extends boolean = false>(options: Options<SyncMirrorData, ThrowOnError>) => (options.client ?? client).post<SyncMirrorResponses, SyncMirrorErrors, ThrowOnError>({
+    url: '/api/v1/backups/{shortId}/mirrors/{mirrorShortId}/sync',
+    ...options,
+    headers: {
+        'Content-Type': 'application/json',
+        ...options.headers
+    }
+});
+
 /**
 * Get mirror compatibility info for all repositories relative to a backup schedule's primary repository
 */
--- a/app/client/api-client/types.gen.ts
+++ b/app/client/api-client/types.gen.ts
@@ -4114,6 +4114,63 @@ export type UpdateScheduleMirrorsResponses = {

 export type UpdateScheduleMirrorsResponse = UpdateScheduleMirrorsResponses[keyof UpdateScheduleMirrorsResponses];

+export type GetMirrorSyncStatusData = {
+    body?: never;
+    path: {
+        shortId: string;
+        mirrorShortId: string;
+    };
+    query?: never;
+    url: '/api/v1/backups/{shortId}/mirrors/{mirrorShortId}/status';
+};
+
+export type GetMirrorSyncStatusResponses = {
+    /**
+     * Mirror sync status with missing snapshots
+     */
+    200: {
+        sourceCount: number;
+        mirrorCount: number;
+        missingSnapshots: Array<{
+            short_id: string;
+            time: string;
+            size: number;
+        }>;
+    };
+};
+
+export type GetMirrorSyncStatusResponse = GetMirrorSyncStatusResponses[keyof GetMirrorSyncStatusResponses];
+
+export type SyncMirrorData = {
+    body: {
+        snapshotIds?: Array<string>;
+    };
+    path: {
+        shortId: string;
+        mirrorShortId: string;
+    };
+    query?: never;
+    url: '/api/v1/backups/{shortId}/mirrors/{mirrorShortId}/sync';
+};
+
+export type SyncMirrorErrors = {
+    /**
+     * Mirror is already syncing
+     */
+    409: unknown;
+};
+
+export type SyncMirrorResponses = {
+    /**
+     * Mirror sync started successfully
+     */
+    200: {
+        success: boolean;
+    };
+};
+
+export type SyncMirrorResponse = SyncMirrorResponses[keyof SyncMirrorResponses];
+
 export type GetMirrorCompatibilityData = {
    body?: never;
    path: {
--- a/app/client/modules/backups/components/schedule-mirrors-config.tsx
+++ b/app/client/modules/backups/components/schedule-mirrors-config.tsx
@@ -1,5 +1,5 @@
 import { useMutation, useQuery, useSuspenseQuery } from "@tanstack/react-query";
-import { Copy, Plus, Trash2 } from "lucide-react";
+import { Copy, Plus, RefreshCw, Trash2 } from "lucide-react";
 import { useEffect, useMemo, useState } from "react";
 import { toast } from "sonner";
 import { Button } from "~/client/components/ui/button";
@@ -8,21 +8,33 @@ import { Switch } from "~/client/components/ui/switch";
 import { Select, SelectContent, SelectItem, SelectTrigger, SelectValue } from "~/client/components/ui/select";
 import { Table, TableBody, TableCell, TableHead, TableHeader, TableRow } from "~/client/components/ui/table";
 import { Badge } from "~/client/components/ui/badge";
+import { Checkbox } from "~/client/components/ui/checkbox";
 import { Tooltip, TooltipContent, TooltipTrigger } from "~/client/components/ui/tooltip";
+import {
+	Dialog,
+	DialogContent,
+	DialogDescription,
+	DialogFooter,
+	DialogHeader,
+	DialogTitle,
+} from "~/client/components/ui/dialog";
 import {
 	getScheduleMirrorsOptions,
 	getMirrorCompatibilityOptions,
+	getMirrorSyncStatusOptions,
 	updateScheduleMirrorsMutation,
+	syncMirrorMutation,
 } from "~/client/api-client/@tanstack/react-query.gen";
 import { parseError } from "~/client/lib/errors";
 import type { Repository } from "~/client/lib/types";
 import { RepositoryIcon } from "~/client/components/repository-icon";
 import { StatusDot } from "~/client/components/status-dot";
+import { ByteSize } from "~/client/components/bytes-size";
 import { useServerEvents } from "~/client/hooks/use-server-events";
-import { formatDistanceToNow } from "date-fns";
 import { cn } from "~/client/lib/utils";
 import type { GetScheduleMirrorsResponse } from "~/client/api-client";
 import { Link } from "@tanstack/react-router";
+import { useTimeFormat } from "~/client/lib/datetime";

 type Props = {
 	scheduleShortId: string;
@@ -56,11 +68,29 @@ const buildAssignments = (mirrors: GetScheduleMirrorsResponse) =>
 	);

 export const ScheduleMirrorsConfig = ({ scheduleShortId, primaryRepositoryId, repositories, initialData }: Props) => {
+	const { formatDateTime, formatTimeAgo } = useTimeFormat();
 	const [assignments, setAssignments] = useState<Map<string, MirrorAssignment>>(() => buildAssignments(initialData));
 	const [hasChanges, setHasChanges] = useState(false);
 	const [isAddingNew, setIsAddingNew] = useState(false);
+	const [syncDialogMirrorId, setSyncDialogMirrorId] = useState<string | null>(null);
+	const [selectedSnapshotIds, setSelectedSnapshotIds] = useState<Set<string>>(new Set());
+	const [syncDialogOpen, setSyncDialogOpen] = useState(false);
 	const { addEventListener } = useServerEvents();

+	const closeSyncDialog = () => {
+		setSyncDialogOpen(false);
+		setTimeout(() => {
+			setSyncDialogMirrorId(null);
+			setSelectedSnapshotIds(new Set());
+		}, 300);
+	};
+
+	const openSyncDialog = (mirrorShortId: string) => {
+		setSyncDialogOpen(true);
+		setSelectedSnapshotIds(new Set());
+		setSyncDialogMirrorId(mirrorShortId);
+	};
+
 	const { data: currentMirrors } = useSuspenseQuery({
 		...getScheduleMirrorsOptions({ path: { shortId: scheduleShortId } }),
 	});
@@ -88,6 +118,47 @@ export const ScheduleMirrorsConfig = ({ scheduleShortId, primaryRepositoryId, re
 		},
 	});

+	const { data: syncStatus, isLoading: isSyncStatusLoading } = useQuery({
+		...getMirrorSyncStatusOptions({
+			path: { shortId: scheduleShortId, mirrorShortId: syncDialogMirrorId ?? "" },
+		}),
+		enabled: syncDialogMirrorId !== null,
+	});
+
+	const toggleSnapshotSelection = (shortId: string) => {
+		setSelectedSnapshotIds((prev) => {
+			const next = new Set(prev);
+			if (next.has(shortId)) {
+				next.delete(shortId);
+			} else {
+				next.add(shortId);
+			}
+			return next;
+		});
+	};
+
+	const toggleAllSnapshots = () => {
+		if (!syncStatus) return;
+		if (selectedSnapshotIds.size === syncStatus.missingSnapshots.length) {
+			setSelectedSnapshotIds(new Set());
+		} else {
+			setSelectedSnapshotIds(new Set(syncStatus.missingSnapshots.map((s) => s.short_id)));
+		}
+	};
+
+	const triggerSync = useMutation({
+		...syncMirrorMutation(),
+		onSuccess: () => {
+			toast.success("Full sync started");
+			closeSyncDialog();
+		},
+		onError: (error) => {
+			toast.error("Failed to start sync", {
+				description: parseError(error)?.message,
+			});
+		},
+	});
+
 	const compatibilityMap = useMemo(() => {
 		const map = new Map<string, { compatible: boolean; reason: string | null }>();
 		if (compatibility) {
@@ -221,7 +292,7 @@ export const ScheduleMirrorsConfig = ({ scheduleShortId, primaryRepositoryId, re
 			return "Syncing...";
 		}
 		if (assignment.lastCopyAt) {
-			return formatDistanceToNow(new Date(assignment.lastCopyAt), { addSuffix: true });
+			return formatTimeAgo(assignment.lastCopyAt);
 		}
 		return "Never";
 	};
@@ -239,6 +310,8 @@ export const ScheduleMirrorsConfig = ({ scheduleShortId, primaryRepositoryId, re
 		return "Never copied";
 	};

+	const selectedMirrorRepo = repositories.find((r) => r.shortId === syncDialogMirrorId);
+
 	return (
 		<Card>
 			<CardHeader>
@@ -369,14 +442,30 @@ export const ScheduleMirrorsConfig = ({ scheduleShortId, primaryRepositoryId, re
 												</div>
 											</TableCell>
 											<TableCell>
-												<Button
-													variant="ghost"
-													size="icon"
-													onClick={() => removeRepository(repository.shortId)}
-													className="h-8 w-8 text-muted-foreground hover:text-destructive align-baseline"
-												>
-													<Trash2 className="h-4 w-4" />
-												</Button>
+												<div className="flex items-center gap-1">
+													<Tooltip>
+														<TooltipTrigger asChild>
+															<Button
+																variant="ghost"
+																size="icon"
+																onClick={() => openSyncDialog(repository.shortId)}
+																disabled={isSyncing(assignment) || hasChanges}
+																className="h-8 w-8 text-muted-foreground hover:text-foreground"
+															>
+																<RefreshCw className={cn("h-4 w-4", isSyncing(assignment) && "animate-spin")} />
+															</Button>
+														</TooltipTrigger>
+														<TooltipContent>Sync more snapshots</TooltipContent>
+													</Tooltip>
+													<Button
+														variant="ghost"
+														size="icon"
+														onClick={() => removeRepository(repository.shortId)}
+														className="h-8 w-8 text-muted-foreground hover:text-destructive align-baseline"
+													>
+														<Trash2 className="h-4 w-4" />
+													</Button>
+												</div>
 											</TableCell>
 										</TableRow>
 									);
@@ -396,6 +485,89 @@ export const ScheduleMirrorsConfig = ({ scheduleShortId, primaryRepositoryId, re
 						</Button>
 					</div>
 				)}
+
+				<Dialog open={syncDialogOpen} onOpenChange={(open) => !open && closeSyncDialog()}>
+					<DialogContent>
+						<DialogHeader>
+							<DialogTitle>Sync snapshots</DialogTitle>
+							<DialogDescription>
+								{`Sync missing snapshots to ${selectedMirrorRepo?.name || "mirror repository"}.`}
+							</DialogDescription>
+						</DialogHeader>
+
+						{isSyncStatusLoading && !syncStatus ? (
+							<div className="py-6 text-center text-muted-foreground text-sm">Loading snapshot status...</div>
+						) : syncStatus && syncStatus.missingSnapshots.length === 0 ? (
+							<div className="py-6 text-center text-muted-foreground text-sm">
+								All {syncStatus.sourceCount} snapshots are already synced to this mirror.
+							</div>
+						) : syncStatus ? (
+							<div className="space-y-3">
+								<p className="text-sm text-muted-foreground">
+									{syncStatus.missingSnapshots.length} of {syncStatus.sourceCount} snapshots are missing in this mirror.
+								</p>
+								<div className="rounded-md border max-h-64 overflow-y-auto">
+									<Table>
+										<TableHeader>
+											<TableRow>
+												<TableHead className="w-10">
+													<Checkbox
+														checked={selectedSnapshotIds.size === syncStatus.missingSnapshots.length}
+														onCheckedChange={toggleAllSnapshots}
+													/>
+												</TableHead>
+												<TableHead>ID</TableHead>
+												<TableHead>Date</TableHead>
+												<TableHead className="text-right">Size</TableHead>
+											</TableRow>
+										</TableHeader>
+										<TableBody>
+											{syncStatus.missingSnapshots.map((snapshot) => (
+												<TableRow
+													key={snapshot.short_id}
+													className="cursor-pointer"
+													onClick={() => toggleSnapshotSelection(snapshot.short_id)}
+												>
+													<TableCell onClick={(e) => e.stopPropagation()}>
+														<Checkbox
+															checked={selectedSnapshotIds.has(snapshot.short_id)}
+															onCheckedChange={() => toggleSnapshotSelection(snapshot.short_id)}
+														/>
+													</TableCell>
+													<TableCell className="font-mono text-xs">{snapshot.short_id}</TableCell>
+													<TableCell className="text-sm">{formatDateTime(new Date(snapshot.time))}</TableCell>
+													<TableCell className="text-right text-sm">
+														<ByteSize bytes={snapshot.size} base={1024} />
+													</TableCell>
+												</TableRow>
+											))}
+										</TableBody>
+									</Table>
+								</div>
+							</div>
+						) : null}
+
+						<DialogFooter>
+							<Button variant="outline" onClick={closeSyncDialog}>
+								Cancel
+							</Button>
+							<Button
+								onClick={() => {
+									if (syncDialogMirrorId) {
+										triggerSync.mutate({
+											path: { shortId: scheduleShortId, mirrorShortId: syncDialogMirrorId },
+											body: { snapshotIds: Array.from(selectedSnapshotIds) },
+										});
+									}
+								}}
+								loading={triggerSync.isPending}
+								disabled={selectedSnapshotIds.size === 0}
+							>
+								Sync {selectedSnapshotIds.size} snapshots
+							</Button>
+						</DialogFooter>
+					</DialogContent>
+				</Dialog>
 			</CardContent>
 		</Card>
 	);
--- a/app/server/modules/backups/tests/backups.controller.test.ts
+++ b/app/server/modules/backups/tests/backups.controller.test.ts
@@ -54,6 +54,8 @@ describe("backups security", () => {
 			{ method: "GET", path: "/api/v1/backups/1/mirrors" },
 			{ method: "PUT", path: "/api/v1/backups/1/mirrors" },
 			{ method: "GET", path: "/api/v1/backups/1/mirrors/compatibility" },
+			{ method: "GET", path: "/api/v1/backups/1/mirrors/abc/status" },
+			{ method: "POST", path: "/api/v1/backups/1/mirrors/abc/sync" },
 			{ method: "POST", path: "/api/v1/backups/reorder" },
 			{ method: "GET", path: "/api/v1/backups/1/progress" },
 		];
--- a/app/server/modules/backups/tests/backups.mirror-sync.test.ts
+++ b/app/server/modules/backups/tests/backups.mirror-sync.test.ts
@@ -0,0 +1,248 @@
+import { afterEach, describe, expect, test, vi } from "vitest";
+import waitForExpect from "wait-for-expect";
+import { backupsService } from "../backups.service";
+import { createTestVolume } from "~/test/helpers/volume";
+import { createTestBackupSchedule } from "~/test/helpers/backup";
+import { createTestRepository } from "~/test/helpers/repository";
+import { createTestBackupScheduleMirror } from "~/test/helpers/backup-mirror";
+import { TEST_ORG_ID } from "~/test/helpers/organization";
+import * as context from "~/server/core/request-context";
+import * as resticModule from "~/server/core/restic";
+import * as spawnModule from "@zerobyte/core/node";
+import type { ShortId } from "~/server/utils/branded";
+
+const setup = () => {
+	vi.spyOn(context, "getOrganizationId").mockReturnValue(TEST_ORG_ID);
+	vi.spyOn(spawnModule, "safeSpawn").mockImplementation(() => Promise.resolve({ exitCode: 0, summary: "", error: "" }));
+
+	return {
+		mockSnapshots: (sourceSnapshots: unknown[], mirrorSnapshots: unknown[]) => {
+			let callCount = 0;
+			vi.spyOn(resticModule.restic, "snapshots").mockImplementation(() => {
+				callCount++;
+				if (callCount === 1) return Promise.resolve(sourceSnapshots as never);
+				return Promise.resolve(mirrorSnapshots as never);
+			});
+		},
+		mockCopy: () => {
+			const copyMock = vi
+				.spyOn(resticModule.restic, "copy")
+				.mockImplementation(() => Promise.resolve({ success: true, output: "" }));
+			return copyMock;
+		},
+	};
+};
+
+afterEach(() => {
+	vi.restoreAllMocks();
+});
+
+describe("getMirrorSyncStatus", () => {
+	test("should return missing snapshots based on time comparison", async () => {
+		const { mockSnapshots } = setup();
+		const volume = await createTestVolume();
+		const repository = await createTestRepository();
+		const mirrorRepository = await createTestRepository();
+		const schedule = await createTestBackupSchedule({
+			volumeId: volume.id,
+			repositoryId: repository.id,
+		});
+		await createTestBackupScheduleMirror(schedule.id, mirrorRepository.id);
+
+		mockSnapshots(
+			[
+				{
+					id: "aaa",
+					short_id: "aaa",
+					time: "2025-01-01T10:00:00Z",
+					paths: ["/data"],
+					summary: { total_bytes_processed: 100 },
+				},
+				{
+					id: "bbb",
+					short_id: "bbb",
+					time: "2025-01-02T10:00:00Z",
+					paths: ["/data"],
+					summary: { total_bytes_processed: 200 },
+				},
+				{
+					id: "ccc",
+					short_id: "ccc",
+					time: "2025-01-03T10:00:00Z",
+					paths: ["/data"],
+					summary: { total_bytes_processed: 300 },
+				},
+			],
+			[
+				{
+					id: "xxx",
+					short_id: "xxx",
+					time: "2025-01-01T10:00:00Z",
+					paths: ["/data"],
+					summary: { total_bytes_processed: 100 },
+				},
+			],
+		);
+
+		const status = await backupsService.getMirrorSyncStatus(schedule.shortId, mirrorRepository.shortId as ShortId);
+
+		expect(status.sourceCount).toBe(3);
+		expect(status.mirrorCount).toBe(1);
+		expect(status.missingSnapshots).toHaveLength(2);
+		expect(status.missingSnapshots.map((s) => s.short_id)).toEqual(["bbb", "ccc"]);
+	});
+
+	test("should return empty missing list when all snapshots are synced", async () => {
+		const { mockSnapshots } = setup();
+		const volume = await createTestVolume();
+		const repository = await createTestRepository();
+		const mirrorRepository = await createTestRepository();
+		const schedule = await createTestBackupSchedule({
+			volumeId: volume.id,
+			repositoryId: repository.id,
+		});
+		await createTestBackupScheduleMirror(schedule.id, mirrorRepository.id);
+
+		mockSnapshots(
+			[
+				{
+					id: "aaa",
+					short_id: "aaa",
+					time: "2025-01-01T10:00:00Z",
+					paths: ["/data"],
+					summary: { total_bytes_processed: 100 },
+				},
+			],
+			[
+				{
+					id: "xxx",
+					short_id: "xxx",
+					time: "2025-01-01T10:00:00Z",
+					paths: ["/data"],
+					summary: { total_bytes_processed: 100 },
+				},
+			],
+		);
+
+		const status = await backupsService.getMirrorSyncStatus(schedule.shortId, mirrorRepository.shortId as ShortId);
+
+		expect(status.sourceCount).toBe(1);
+		expect(status.mirrorCount).toBe(1);
+		expect(status.missingSnapshots).toHaveLength(0);
+	});
+
+	test("should throw if mirror is not configured for the schedule", async () => {
+		setup();
+		const volume = await createTestVolume();
+		const repository = await createTestRepository();
+		const unrelatedRepository = await createTestRepository();
+		const schedule = await createTestBackupSchedule({
+			volumeId: volume.id,
+			repositoryId: repository.id,
+		});
+
+		await expect(
+			backupsService.getMirrorSyncStatus(schedule.shortId, unrelatedRepository.shortId as ShortId),
+		).rejects.toThrow("Mirror not found for this schedule");
+	});
+});
+
+describe("syncMirror", () => {
+	test("should trigger sync and return success", async () => {
+		setup();
+		const volume = await createTestVolume();
+		const repository = await createTestRepository();
+		const mirrorRepository = await createTestRepository();
+		const schedule = await createTestBackupSchedule({
+			volumeId: volume.id,
+			repositoryId: repository.id,
+		});
+		await createTestBackupScheduleMirror(schedule.id, mirrorRepository.id);
+
+		const result = await backupsService.syncMirror(schedule.shortId, mirrorRepository.shortId as ShortId, [
+			"snap1",
+			"snap2",
+		]);
+
+		expect(result.success).toBe(true);
+	});
+
+	test("should reject if mirror is already syncing", async () => {
+		setup();
+		const volume = await createTestVolume();
+		const repository = await createTestRepository();
+		const mirrorRepository = await createTestRepository();
+		const schedule = await createTestBackupSchedule({
+			volumeId: volume.id,
+			repositoryId: repository.id,
+		});
+		await createTestBackupScheduleMirror(schedule.id, mirrorRepository.id, {
+			lastCopyStatus: "in_progress",
+		});
+
+		await expect(
+			backupsService.syncMirror(schedule.shortId, mirrorRepository.shortId as ShortId, ["snap1"]),
+		).rejects.toThrow("Mirror is already syncing");
+	});
+
+	test("should reject concurrent sync requests once a sync has started", async () => {
+		const { mockCopy } = setup();
+		const copyMock = mockCopy();
+		let releaseCopy: (() => void) | undefined;
+		const copyStarted = new Promise<void>((resolve) => {
+			copyMock.mockImplementation(
+				() =>
+					new Promise((copyResolve) => {
+						releaseCopy = () => copyResolve({ success: true, output: "" });
+						resolve();
+					}),
+			);
+		});
+
+		const volume = await createTestVolume();
+		const repository = await createTestRepository();
+		const mirrorRepository = await createTestRepository();
+		const schedule = await createTestBackupSchedule({
+			volumeId: volume.id,
+			repositoryId: repository.id,
+		});
+		await createTestBackupScheduleMirror(schedule.id, mirrorRepository.id);
+
+		await expect(
+			backupsService.syncMirror(schedule.shortId, mirrorRepository.shortId as ShortId, ["snap1"]),
+		).resolves.toEqual({ success: true });
+
+		await copyStarted;
+
+		await waitForExpect(async () => {
+			const mirrors = await backupsService.getMirrors(schedule.shortId);
+			expect(mirrors[0]?.lastCopyStatus).toBe("in_progress");
+		});
+
+		await expect(
+			backupsService.syncMirror(schedule.shortId, mirrorRepository.shortId as ShortId, ["snap1"]),
+		).rejects.toThrow("Mirror is already syncing");
+
+		releaseCopy?.();
+
+		await waitForExpect(async () => {
+			const mirrors = await backupsService.getMirrors(schedule.shortId);
+			expect(mirrors[0]?.lastCopyStatus).toBe("success");
+		});
+	});
+
+	test("should throw if mirror is not configured for the schedule", async () => {
+		setup();
+		const volume = await createTestVolume();
+		const repository = await createTestRepository();
+		const unrelatedRepository = await createTestRepository();
+		const schedule = await createTestBackupSchedule({
+			volumeId: volume.id,
+			repositoryId: repository.id,
+		});
+
+		await expect(
+			backupsService.syncMirror(schedule.shortId, unrelatedRepository.shortId as ShortId, ["snap1"]),
+		).rejects.toThrow("Mirror not found for this schedule");
+	});
+});
--- a/app/server/modules/backups/backups.controller.ts
+++ b/app/server/modules/backups/backups.controller.ts
@@ -5,8 +5,10 @@ import {
 	createBackupScheduleDto,
 	deleteBackupScheduleDto,
 	getBackupScheduleDto,
+	getBackupScheduleResponse,
 	getBackupScheduleForVolumeDto,
 	listBackupSchedulesDto,
+	listBackupSchedulesResponse,
 	runBackupNowDto,
 	runForgetDto,
 	stopBackupDto,
@@ -16,9 +18,12 @@ import {
 	updateScheduleMirrorsDto,
 	updateScheduleMirrorsBody,
 	getMirrorCompatibilityDto,
+	getMirrorSyncStatusDto,
 	reorderBackupSchedulesDto,
 	reorderBackupSchedulesBody,
 	getBackupProgressDto,
+	syncMirrorBody,
+	syncMirrorDto,
 	type CreateBackupScheduleDto,
 	type DeleteBackupScheduleDto,
 	type GetBackupScheduleDto,
@@ -33,8 +38,8 @@ import {
 	type GetMirrorCompatibilityDto,
 	type ReorderBackupSchedulesDto,
 	type GetBackupProgressDto,
-	listBackupSchedulesResponse,
-	getBackupScheduleResponse,
+	type GetMirrorSyncStatusDto,
+	type SyncMirrorDto,
 } from "./backups.dto";
 import { backupsService } from "./backups.service";
 import {
@@ -155,6 +160,21 @@ export const backupScheduleController = new Hono()

 		return c.json<UpdateScheduleMirrorsDto>(mirrors, 200);
 	})
+	.get("/:shortId/mirrors/:mirrorShortId/status", getMirrorSyncStatusDto, async (c) => {
+		const shortId = asShortId(c.req.param("shortId"));
+		const mirrorShortId = asShortId(c.req.param("mirrorShortId"));
+		const status = await backupsService.getMirrorSyncStatus(shortId, mirrorShortId);
+
+		return c.json<GetMirrorSyncStatusDto>(status, 200);
+	})
+	.post("/:shortId/mirrors/:mirrorShortId/sync", syncMirrorDto, validator("json", syncMirrorBody), async (c) => {
+		const shortId = asShortId(c.req.param("shortId"));
+		const mirrorShortId = asShortId(c.req.param("mirrorShortId"));
+		const body = c.req.valid("json");
+		const result = await backupsService.syncMirror(shortId, mirrorShortId, body.snapshotIds);
+
+		return c.json<SyncMirrorDto>(result, 200);
+	})
 	.get("/:shortId/mirrors/compatibility", getMirrorCompatibilityDto, async (c) => {
 		const shortId = asShortId(c.req.param("shortId"));
 		const compatibility = await backupsService.getMirrorCompatibility(shortId);
--- a/app/server/modules/backups/backups.dto.ts
+++ b/app/server/modules/backups/backups.dto.ts
@@ -400,6 +400,65 @@ export const reorderBackupSchedulesDto = describeRoute({
 	},
 });

+const missingSnapshotSchema = z.object({
+	short_id: z.string(),
+	time: z.string(),
+	size: z.number(),
+});
+
+export const getMirrorSyncStatusResponse = z.object({
+	sourceCount: z.number(),
+	mirrorCount: z.number(),
+	missingSnapshots: missingSnapshotSchema.array(),
+});
+export type GetMirrorSyncStatusDto = z.infer<typeof getMirrorSyncStatusResponse>;
+
+export const getMirrorSyncStatusDto = describeRoute({
+	description: "Get sync status for a specific mirror, including missing snapshots",
+	operationId: "getMirrorSyncStatus",
+	tags: ["Backups"],
+	responses: {
+		200: {
+			description: "Mirror sync status with missing snapshots",
+			content: {
+				"application/json": {
+					schema: resolver(getMirrorSyncStatusResponse),
+				},
+			},
+		},
+	},
+});
+
+export const syncMirrorBody = z.object({
+	snapshotIds: z.array(z.string()).optional(),
+});
+
+export type SyncMirrorBody = z.infer<typeof syncMirrorBody>;
+
+export const syncMirrorResponse = z.object({
+	success: z.boolean(),
+});
+export type SyncMirrorDto = z.infer<typeof syncMirrorResponse>;
+
+export const syncMirrorDto = describeRoute({
+	description: "Sync selected snapshots to a specific mirror repository",
+	operationId: "syncMirror",
+	tags: ["Backups"],
+	responses: {
+		200: {
+			description: "Mirror sync started successfully",
+			content: {
+				"application/json": {
+					schema: resolver(syncMirrorResponse),
+				},
+			},
+		},
+		409: {
+			description: "Mirror is already syncing",
+		},
+	},
+});
+
 const getBackupProgressResponse = backupProgressEventSchema.nullable();
 export type GetBackupProgressDto = z.infer<typeof getBackupProgressResponse>;

--- a/app/server/modules/backups/backups.queries.ts
+++ b/app/server/modules/backups/backups.queries.ts
@@ -60,6 +60,13 @@ export const mirrorQueries = {
 		});
 	},

+	findByScheduleAndRepository: async (scheduleId: number, repositoryId: string) => {
+		return db.query.backupScheduleMirrorsTable.findFirst({
+			where: { scheduleId, repositoryId },
+			with: { repository: true },
+		});
+	},
+
 	updateStatus: async (scheduleId: number, repositoryId: string, status: MirrorStatusUpdate) => {
 		return db
 			.update(backupScheduleMirrorsTable)
--- a/app/server/modules/backups/backups.service.ts
+++ b/app/server/modules/backups/backups.service.ts
@@ -25,7 +25,10 @@ import {
 	validateBackupExecution,
 } from "./helpers/backup-lifecycle";
 import { getScheduleByIdOrShortId } from "./helpers/backup-schedule-lookups";
-import { copyToMirrors, runForget } from "./helpers/backup-maintenance";
+import { copyToMirrors, runForget, syncSnapshotsToMirror } from "./helpers/backup-maintenance";
+import { restic } from "../../core/restic";
+import { mirrorQueries } from "./backups.queries";
+import { toMessage } from "../../utils/errors";

 const listSchedules = async () => {
 	const organizationId = getOrganizationId();
@@ -469,6 +472,79 @@ const stopBackup = async (scheduleId: number) => {
 	}
 };

+const getMirrorSyncStatus = async (scheduleIdOrShortId: number | string, mirrorShortId: ShortId) => {
+	const organizationId = getOrganizationId();
+	const schedule = await getScheduleByIdOrShortId(scheduleIdOrShortId);
+
+	const mirrorRepo = await db.query.repositoriesTable.findFirst({
+		where: {
+			AND: [{ shortId: { eq: mirrorShortId } }, { organizationId }],
+		},
+	});
+
+	if (!mirrorRepo) {
+		throw new NotFoundError("Mirror repository not found");
+	}
+
+	const mirror = await mirrorQueries.findByScheduleAndRepository(schedule.id, mirrorRepo.id);
+
+	if (!mirror) {
+		throw new NotFoundError("Mirror not found for this schedule");
+	}
+
+	const [sourceSnapshots, mirrorSnapshots] = await Promise.all([
+		restic.snapshots(schedule.repository.config, { tags: [schedule.shortId], organizationId }),
+		restic.snapshots(mirrorRepo.config, { tags: [schedule.shortId], organizationId }),
+	]);
+
+	const mirrorSnapshotTimes = new Set(mirrorSnapshots.map((s) => s.time));
+
+	const missingSnapshots = sourceSnapshots
+		.filter((s) => !mirrorSnapshotTimes.has(s.time))
+		.map((s) => ({
+			short_id: s.short_id,
+			time: s.time,
+			size: s.summary?.total_bytes_processed ?? 0,
+		}));
+
+	return {
+		sourceCount: sourceSnapshots.length,
+		mirrorCount: mirrorSnapshots.length,
+		missingSnapshots,
+	};
+};
+
+const syncMirror = async (scheduleIdOrShortId: number | string, mirrorShortId: ShortId, snapshotIds?: string[]) => {
+	const organizationId = getOrganizationId();
+	const schedule = await getScheduleByIdOrShortId(scheduleIdOrShortId);
+
+	const mirrorRepo = await db.query.repositoriesTable.findFirst({
+		where: {
+			AND: [{ shortId: { eq: mirrorShortId } }, { organizationId }],
+		},
+	});
+
+	if (!mirrorRepo) {
+		throw new NotFoundError("Mirror repository not found");
+	}
+
+	const mirror = await mirrorQueries.findByScheduleAndRepository(schedule.id, mirrorRepo.id);
+
+	if (!mirror) {
+		throw new NotFoundError("Mirror not found for this schedule");
+	}
+
+	if (mirror.lastCopyStatus === "in_progress") {
+		throw new ConflictError("Mirror is already syncing");
+	}
+
+	syncSnapshotsToMirror(schedule.id, mirrorRepo.id, organizationId, snapshotIds).catch((error) => {
+		logger.error(`Error syncing all snapshots to mirror ${mirrorRepo.name}: ${toMessage(error)}`);
+	});
+
+	return { success: true };
+};
+
 export const backupsService = {
 	listSchedules,
 	createSchedule,
@@ -487,4 +563,6 @@ export const backupsService = {
 	stopBackup,
 	runForget,
 	copyToMirrors,
+	getMirrorSyncStatus,
+	syncMirror,
 };
--- a/app/server/modules/backups/helpers/backup-maintenance.ts
+++ b/app/server/modules/backups/helpers/backup-maintenance.ts
@@ -66,6 +66,114 @@ export async function copyToMirrors(
 	}
 }

+export async function syncSnapshotsToMirror(
+	scheduleId: number,
+	mirrorRepositoryId: string,
+	organizationIdOverride?: string,
+	snapshotIds?: string[],
+) {
+	const organizationId = organizationIdOverride ?? getOrganizationId();
+	const schedule = await scheduleQueries.findById(scheduleId, organizationId);
+
+	if (!schedule) {
+		throw new NotFoundError("Backup schedule not found");
+	}
+
+	const mirror = await mirrorQueries.findByScheduleAndRepository(scheduleId, mirrorRepositoryId);
+
+	if (!mirror) {
+		throw new NotFoundError("Mirror not found for this schedule");
+	}
+
+	const sourceRepository = await repositoryQueries.findById(schedule.repositoryId, organizationId);
+
+	if (!sourceRepository) {
+		throw new NotFoundError("Source repository not found");
+	}
+
+	const mirrorRepository = await repositoryQueries.findById(mirrorRepositoryId, organizationId);
+
+	if (!mirrorRepository) {
+		throw new NotFoundError("Mirror repository not found");
+	}
+
+	try {
+		logger.info(`[Background] Syncing all snapshots to mirror repository: ${mirrorRepository.name}`);
+
+		serverEvents.emit("mirror:started", {
+			organizationId,
+			scheduleId: schedule.shortId,
+			repositoryId: mirrorRepository.shortId,
+			repositoryName: mirrorRepository.name,
+		});
+
+		await mirrorQueries.updateStatus(scheduleId, mirrorRepositoryId, {
+			lastCopyStatus: "in_progress",
+			lastCopyError: null,
+		});
+
+		const releaseLocks = await repoMutex.acquireMany([
+			{ repositoryId: sourceRepository.id, type: "shared", operation: `mirror_sync_source:${scheduleId}` },
+			{ repositoryId: mirrorRepository.id, type: "exclusive", operation: `mirror_sync:${scheduleId}` },
+		]);
+
+		try {
+			await restic.copy(sourceRepository.config, mirrorRepository.config, {
+				tag: schedule.shortId,
+				organizationId,
+				snapshotIds,
+			});
+			cache.delByPrefix(cacheKeys.repository.all(mirrorRepository.id));
+		} finally {
+			releaseLocks();
+		}
+
+		if (schedule.retentionPolicy) {
+			void runForget(scheduleId, mirrorRepository.id, organizationId).catch((error) => {
+				logger.error(
+					`Failed to run retention policy for mirror repository ${mirrorRepository.name}: ${toMessage(error)}`,
+				);
+			});
+		}
+
+		await mirrorQueries.updateStatus(scheduleId, mirrorRepositoryId, {
+			lastCopyAt: Date.now(),
+			lastCopyStatus: "success",
+			lastCopyError: null,
+		});
+
+		logger.info(`[Background] Successfully synced all snapshots to mirror repository: ${mirrorRepository.name}`);
+
+		serverEvents.emit("mirror:completed", {
+			organizationId,
+			scheduleId: schedule.shortId,
+			repositoryId: mirrorRepository.shortId,
+			repositoryName: mirrorRepository.name,
+			status: "success",
+		});
+	} catch (error) {
+		const errorMessage = toMessage(error);
+		logger.error(
+			`[Background] Failed to sync all snapshots to mirror repository ${mirrorRepository.name}: ${errorMessage}`,
+		);
+
+		await mirrorQueries.updateStatus(scheduleId, mirrorRepositoryId, {
+			lastCopyAt: Date.now(),
+			lastCopyStatus: "error",
+			lastCopyError: errorMessage,
+		});
+
+		serverEvents.emit("mirror:completed", {
+			organizationId,
+			scheduleId: schedule.shortId,
+			repositoryId: mirrorRepository.shortId,
+			repositoryName: mirrorRepository.name,
+			status: "error",
+			error: errorMessage,
+		});
+	}
+}
+
 async function copyToSingleMirror(
 	scheduleId: number,
 	schedule: BackupSchedule,
--- a/e2e/0004-mirror-sync.spec.ts
+++ b/e2e/0004-mirror-sync.spec.ts
@@ -0,0 +1,139 @@
+import fs from "node:fs";
+import { randomUUID } from "node:crypto";
+import path from "node:path";
+import { type Page, type TestInfo } from "@playwright/test";
+import { expect, test } from "./test";
+import { gotoAndWaitForAppReady } from "./helpers/page";
+
+const testDataPath = path.join(process.cwd(), "playwright", "temp");
+
+function getRunId(testInfo: TestInfo) {
+	return `${testInfo.parallelIndex}-${testInfo.retry}-${randomUUID().slice(0, 8)}`;
+}
+
+function getWorkerTestDataPath() {
+	fs.mkdirSync(testDataPath, { recursive: true });
+	return testDataPath;
+}
+
+async function createRepository(page: Page, name: string) {
+	await gotoAndWaitForAppReady(page, "/repositories");
+	await page.getByRole("button", { name: "Create repository" }).click();
+	await page.getByRole("textbox", { name: "Name" }).fill(name);
+	await page.getByRole("combobox", { name: "Backend" }).click();
+	await page.getByRole("option", { name: "Local" }).click();
+	await page.getByRole("button", { name: "Create repository" }).click();
+	await expect(page.getByText("Repository created successfully")).toBeVisible({ timeout: 30000 });
+}
+
+async function createVolume(page: Page, name: string) {
+	await gotoAndWaitForAppReady(page, "/volumes");
+	const volumeNameInput = page.getByRole("textbox", { name: "Name" });
+	await expect(async () => {
+		await page.getByRole("button", { name: "Create Volume" }).click();
+		await expect(volumeNameInput).toBeVisible();
+	}).toPass({ timeout: 10000 });
+	await volumeNameInput.fill(name);
+	await page.getByRole("button", { name: "test-data" }).click();
+	await page.getByRole("button", { name: "Create Volume" }).click();
+	await expect(page.getByText("Volume created successfully")).toBeVisible();
+}
+
+async function createBackupJob(page: Page, backupName: string, volumeName: string, repositoryName: string) {
+	await gotoAndWaitForAppReady(page, "/backups");
+	const createBackupButton = page.getByRole("button", { name: "Create a backup job" }).first();
+	if (await createBackupButton.isVisible()) {
+		await createBackupButton.click();
+	} else {
+		await page.getByRole("link", { name: "Create a backup job" }).first().click();
+	}
+	const volumeSelect = page.getByRole("combobox").filter({ hasText: "Choose a volume to backup" });
+	const volumeOption = page.getByRole("option", { name: volumeName });
+	await expect(async () => {
+		await volumeSelect.click();
+		await expect(volumeOption).toBeVisible();
+	}).toPass({ timeout: 10000 });
+	await volumeOption.click();
+	await page.getByRole("textbox", { name: "Backup name" }).fill(backupName);
+	await page.getByRole("combobox").filter({ hasText: "Select a repository" }).click();
+	await page.getByRole("option", { name: repositoryName }).click();
+	await page.getByRole("combobox").filter({ hasText: "Select frequency" }).click();
+	await page.getByRole("option", { name: "Daily" }).click();
+	await page.getByRole("textbox", { name: "Execution time" }).fill("00:00");
+	await page.getByRole("button", { name: "Create" }).click();
+	await expect(page.getByText("Backup job created successfully")).toBeVisible();
+}
+
+test("can sync missing snapshots to a mirror repository", async ({ page }, testInfo) => {
+	const runId = getRunId(testInfo);
+	const volumeName = `Volume-${runId}`;
+	const primaryRepoName = `Primary-${runId}`;
+	const mirrorRepoName = `Mirror-${runId}`;
+	const backupName = `Backup-${runId}`;
+
+	const workerTestDataPath = getWorkerTestDataPath();
+	const runPath = path.join(workerTestDataPath, runId);
+	fs.mkdirSync(runPath, { recursive: true });
+	fs.writeFileSync(path.join(runPath, "test.json"), JSON.stringify({ data: "mirror sync test" }));
+
+	await gotoAndWaitForAppReady(page, "/");
+	await expect(page).toHaveURL("/volumes");
+
+	// Create volume, two repositories, and a backup job
+	await createVolume(page, volumeName);
+	await createRepository(page, primaryRepoName);
+	await createRepository(page, mirrorRepoName);
+	await createBackupJob(page, backupName, volumeName, primaryRepoName);
+
+	// Run a backup to create a snapshot
+	await page.getByRole("button", { name: "Backup now" }).click();
+	await expect(page.getByText("Backup started successfully")).toBeVisible();
+	await expect(page.getByText(/Success|Warning/).first()).toBeVisible({ timeout: 30000 });
+
+	// Add mirror repository
+	await page.getByRole("button", { name: "Add mirror" }).click();
+	const mirrorSelect = page.getByRole("combobox").filter({ hasText: "Select a repository to mirror to..." });
+	await mirrorSelect.click();
+	await page.getByRole("option", { name: mirrorRepoName }).click();
+	await page.getByRole("button", { name: "Save changes" }).click();
+	await expect(page.getByText("Mirror settings saved successfully")).toBeVisible();
+
+	// Click sync button on the mirror row (first icon button in the actions cell)
+	const mirrorRow = page.getByRole("row").filter({ hasText: mirrorRepoName });
+	await mirrorRow.getByRole("button").first().click();
+
+	// Verify the sync dialog shows missing snapshots
+	await expect(page.getByRole("heading", { name: "Sync snapshots" })).toBeVisible();
+	await expect(page.getByText(/1 of 1 snapshots are missing/)).toBeVisible({ timeout: 15000 });
+
+	// Verify there is a checkbox and a snapshot row
+	const snapshotCheckbox = page.getByRole("dialog").getByRole("checkbox").first();
+	await expect(snapshotCheckbox).toBeChecked();
+
+	// Click sync button
+	await page.getByRole("button", { name: "Sync 1 snapshots" }).click();
+	await expect(page.getByText("Full sync started")).toBeVisible();
+
+	// Wait for sync to complete
+	await expect(page.getByText("Syncing...")).toBeVisible({ timeout: 10000 });
+	await expect(page.getByText("Syncing...")).not.toBeVisible({ timeout: 30000 });
+
+	// Open sync dialog again and verify all snapshots are synced
+	await mirrorRow.getByRole("button").first().click();
+	await expect(page.getByRole("heading", { name: "Sync snapshots" })).toBeVisible();
+	await expect(page.getByText(/All 1 snapshots are already synced/)).toBeVisible({ timeout: 15000 });
+	await page.getByRole("button", { name: "Cancel" }).click();
+
+	// Verify snapshot appears in the mirror repository's snapshots tab
+	const response = await page.request.get("/api/v1/repositories");
+	expect(response.ok()).toBe(true);
+	const repositories = (await response.json()) as Array<{ name: string; shortId: string }>;
+	const mirrorRepo = repositories.find((r) => r.name === mirrorRepoName);
+	expect(mirrorRepo).toBeDefined();
+
+	await gotoAndWaitForAppReady(page, `/repositories/${mirrorRepo!.shortId}`);
+	await page.getByRole("tab", { name: "Snapshots" }).click();
+	await expect(page.getByText("Backup snapshots stored in this repository.")).toBeVisible();
+	await page.getByRole("button", { name: "Refresh" }).click();
+	await expect(page.getByRole("checkbox", { name: /Select snapshot/ })).toHaveCount(1, { timeout: 15000 });
+});
--- a/packages/core/src/restic/commands/tests/copy.test.ts
+++ b/packages/core/src/restic/commands/tests/copy.test.ts
@@ -48,12 +48,46 @@ afterEach(() => {
 describe("copy command", () => {
 	test("treats flag-like snapshot IDs as positional args", async () => {
 		const { getArgs } = setup();
-		const snapshotId = "--help";

-		await copy(sourceConfig, destConfig, { organizationId: "org-1", snapshotId, tag: "daily" }, mockDeps);
+		await copy(sourceConfig, destConfig, { organizationId: "org-1", snapshotIds: ["--help"], tag: "daily" }, mockDeps);

 		const separatorIndex = getArgs().indexOf("--");
 		expect(separatorIndex).toBeGreaterThan(-1);
-		expect(getArgs().slice(separatorIndex + 1)).toEqual([snapshotId]);
+		expect(getArgs().slice(separatorIndex + 1)).toEqual(["--help"]);
+	});
+
+	test("defaults to 'latest' when no snapshotIds are provided", async () => {
+		const { getArgs } = setup();
+
+		await copy(sourceConfig, destConfig, { organizationId: "org-1", tag: "daily" }, mockDeps);
+
+		const separatorIndex = getArgs().indexOf("--");
+		expect(separatorIndex).toBeGreaterThan(-1);
+		expect(getArgs().slice(separatorIndex + 1)).toEqual(["latest"]);
+	});
+
+	test("passes multiple snapshot IDs after separator", async () => {
+		const { getArgs } = setup();
+
+		await copy(
+			sourceConfig,
+			destConfig,
+			{ organizationId: "org-1", snapshotIds: ["abc123", "def456", "ghi789"], tag: "daily" },
+			mockDeps,
+		);
+
+		const separatorIndex = getArgs().indexOf("--");
+		expect(separatorIndex).toBeGreaterThan(-1);
+		expect(getArgs().slice(separatorIndex + 1)).toEqual(["abc123", "def456", "ghi789"]);
+	});
+
+	test("defaults to 'latest' when snapshotIds is empty array", async () => {
+		const { getArgs } = setup();
+
+		await copy(sourceConfig, destConfig, { organizationId: "org-1", snapshotIds: [], tag: "daily" }, mockDeps);
+
+		const separatorIndex = getArgs().indexOf("--");
+		expect(separatorIndex).toBeGreaterThan(-1);
+		expect(getArgs().slice(separatorIndex + 1)).toEqual(["latest"]);
 	});
 });
--- a/packages/core/src/restic/commands/copy.ts
+++ b/packages/core/src/restic/commands/copy.ts
@@ -11,7 +11,7 @@ import type { ResticDeps } from "../types";
 export const copy = async (
 	sourceConfig: RepositoryConfig,
 	destConfig: RepositoryConfig,
-	options: { organizationId: string; tag?: string; snapshotId?: string },
+	options: { organizationId: string; tag?: string; snapshotIds?: string[] },
 	deps: ResticDeps,
 ) => {
 	const sourceRepoUrl = buildRepoUrl(sourceConfig);
@@ -45,7 +45,11 @@ export const copy = async (
 		args.push("--limit-upload", destUploadLimit);
 	}

-	args.push("--", options.snapshotId ?? "latest");
+	if (options.snapshotIds && options.snapshotIds.length > 0) {
+		args.push("--", ...options.snapshotIds);
+	} else {
+		args.push("--", "latest");
+	}

 	logger.info(`Copying snapshots from ${sourceRepoUrl} to ${destRepoUrl}...`);
 	logger.debug(`Executing: restic ${args.join(" ")}`);