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Installing large backend images (e.g. vLLM/vLLM-omni, several GiB) over the Web UI could fail with "failed to download layer 0: unexpected EOF" when a single connection to the registry dropped mid-stream. The whole install then failed with no recovery, and since the download is not resumable, retrying from the UI restarted from zero and usually hit the same blip again - so users saw it as a consistent, size-correlated failure (issue #10577). The registry transport already retries manifest/digest fetches via defaultRetryPredicate (GetImage/GetImageDigest), but the per-layer data stream in DownloadOCIImageTar bypassed it entirely: layer.Compressed() + xio.Copy ran exactly once. Extract the per-layer copy into downloadLayerToFile, which retries on the same transient errors (unexpected EOF, EOF, EPIPE, ECONNRESET, connection refused) with exponential backoff, truncating any partial data before each retry. Non-retryable errors and context cancellation still fail fast. Assisted-by: Claude:claude-opus-4-8 [Claude Code] Signed-off-by: Ettore Di Giacinto <mudler@localai.io> Co-authored-by: Ettore Di Giacinto <mudler@localai.io>