AOMEI Backupper reports a VSS or snapshot error. What should I check before retrying?

Applies to: AOMEI Backupper on Windows when a backup fails during snapshot creation.

Work through these checks

1. Open the failed task log and record the error code, time and affected volume. Confirm the backup destination has room, and check free space on the Windows/source volumes as well.
2. Have an administrator run the read-only command vssadmin list writers and record any writer reporting a failure. Check Windows event logs around the same time without changing permissions or deleting shadow copies.
3. Check whether another backup, snapshot or database-maintenance job ran concurrently. Arrange a supported retry after the conflict or failed writer's cause is resolved; restarting services or a server requires an appropriate maintenance window.
4. Review the snapshot service option available in your Backupper version against the workload. Do not switch away from Microsoft VSS simply to remove an error when the application requires VSS-aware consistency. Databases and business applications may need their own supported backup integration.

Confirm the result

A successful job should be followed by the supported image check and a sample restore. Confirm the required application recovery method separately; a completed disk image alone is not that proof.

If you need help

Include these details in your ticket: Backupper/Windows version, exact task error, affected volumes/free space, failed VSS writer status and overlapping job times. Redact paths containing personal data.

Updated 261107