What does HRESULT 0x80042313 (VSS_E_FLUSH_WRITES_TIMEOUT) mean?

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VSS timed out while flushing writes. Retry after storage and application activity are reduced.

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VSS_E_MAXIMUM_NUMBER_OF_VOLUMES_REACHED	VSS_E_HOLD_WRITES_TIMEOUT

VSS_E_FLUSH_WRITES_TIMEOUT

VSS_E_FLUSH_WRITES_TIMEOUT means that the provider could not finish flushing pending data to the source volume in time. This often occurs when write activity or storage latency is high during the snapshot preparation phase.

How to investigate

Correlate the failure with storage latency, queue depth, heavy write workloads, and application activity.
Retry during a quieter period after checking for I/O errors and capacity pressure.
Review provider-specific events; a hardware provider may expose additional array-side diagnostics.

Microsoft: VSS freeze and provider timing

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