Operational Defect Database
BugZero found this defect 3104 days ago.
Data sources
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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.
