What does HRESULT 0x800423F2 (VSS_E_WRITERERROR_TIMEOUT) mean?

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Description:

The writer's timeout expired between the Freeze and Thaw events.

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VSS_E_WRITERERROR_OUTOFRESOURCES	VSS_E_WRITERERROR_RETRYABLE

VSS_E_WRITERERROR_TIMEOUT

VSS_E_WRITERERROR_TIMEOUT The writer timed out between the VSS Freeze and Thaw events. Snapshot creation or the application writer took too long to complete its required transition.

What to check

Check the affected writer, VSS provider, storage latency, and backup application activity during the freeze window.
Look for third-party backup hooks or application deadlocks that delay thaw; Microsoft documents a case where a transaction mutex caused this type of timeout.
Retry only after the system is stable, then investigate recurring timeouts as an availability and consistency risk.

vssadmin list writers

vssadmin list providers

Microsoft: Writer errors and vetoes

Microsoft: VSS timeout troubleshooting

Microsoft: Shadow copy creation for providers

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