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DWA: Handling "Backup Exception: Could Not Setup Volume Snapshot Set"

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This article details troubleshooting for the "Backup Exception: Could not set up volume snapshot set" error in the Datto Windows Agent logs. You may also see "Snapshot failed. Error: 31 - Could not take Datto snapshot set." 

Cause

Mon 24/07/17 11:09:37 am - == Backup Failed ==
Mon 24/07/17 11:09:37 am - Query snapshots: 0 existing snapshots.
Mon 24/07/17 11:09:37 am - Unsuccessful DBD backup.
Mon 24/07/17 11:09:37 am - Backup exception: Could not setup volume
snapshot set.
Mon 24/07/17 11:09:37 am - Snapshot ERROR:
Original Volume: \\?\Volume
{d0d1a0ae-347a-42b0-a99f-37cbc39b4201}
\
Snapshot Volume:
Snapshot State: 5
Error Status: 00000012
Parameters: (1) C000009A (2) 1 (3) 0 (4) 4294967295
Mon 24/07/17 11:09:37 am - Snapshot INFO:
Original Volume: \\?\Volume
{80d8f14b-682d-11e1-8730-806e6f6e6963}
\
Snapshot Volume:
Snapshot State: 1
Error Status: 00000000
Parameters: (1) 00000000 (2) 0 (3) 0 (4) 0
Mon 24/07/17 11:09:37 am - Query snapshots: 2 existing snapshots.
Mon 24/07/17 11:09:37 am - Snapshot failed. Error: 31 - Could not
datto take snapshot set.
Mon 24/07/17 11:09:33 am - Snapshot - Type: DBD
Mon 24/07/17 11:09:33 am - Query snapshots: 0 existing snapshots.
Mon 24/07/17 11:09:33 am - Datto virtual bus driver installed and running
Mon 24/07/17 11:09:33 am - Datto filter driver installed and running
Mon 24/07/17 11:09:33 am - == Backup request: Requested-Diff: No -
Requested-Full: No - Requested-Snapshot-Method: DBD - Target-Type:
Mercury ==

Figure 1: Full error from the agent log

This error commonly happens due to a lack of system resources. The Datto Windows Agent needs at least 1GB of available RAM to function properly. The protected volume also needs enough available space; Datto recommends a minimum of 10 GB or 10% of the total space free, whichever is greater. This is necessary for the agent software to track block-level changes.   


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