Operational Defect Database

BugZero found this defect 3075 days ago.

Veeam | kb2073

Unable to exclude files from snapshot: Shadow Copy Optimization Writer timed out

Last update date:

10/10/2023

Affected products:

Veeam Agent for Microsoft Windows

Affected releases:

2.2

Fixed releases:

No fixed releases provided.

Description:

Challenge

A Veeam Agent for Microsoft Windows backup job  configured to operate in file-level backup mode with an entire volume selected and individual folders excluded, may fail with the error shown below. Unable to exclude files from snapshot: Shadow Copy Optimization Writer timed out.

Cause

The issue is caused by a timeout of the MS Copy Optimization Writer due to a large number of excluded files. In such cases, the Application Event Log on the affected machine may contain entries similar to the one below: Source:        VSS Event ID:      8220 Level:         Information Operation:    OnPostSnapshot event    PostSnapshot Event Context:    Execution Context: Shadow Copy Optimization Writer    Writer Name: Shadow Copy Optimization Writer

Solution

To workaround this VSS issue, two possible approaches are suggested: Option 1: Reduce the number of excluded folders until the warning no longer appears. Option 2: Instead of selecting an entire volume within file-level backup and excluding folders, select only the individual folders that need to be backed up.

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Status

Solved

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