This post is for me in case it happens again—it may not work for you.
If the Veeam backup on the server fails with the error message below, it’s likely because the server has been rebooted (perhaps after an update, or a power outage) and certain services either didn’t restart correctly or have to be stopped.
Do this on the server:
- Restart these services:
- COM + Event System
- COM + System Application services
- Stop this service:
- Volume Shadow Copy
*****
Error message:
Creating VSS snapshot Error: Failed to create snapshot: Backup job failed. Cannot create a shadow copy of the volumes containing writer’s data. A VSS critical writer has failed. Writer name: [SqlServerWriter]. Class ID: [{a65faa63-5ea8-4ebc-9dbd-a0c4db26912a}]. Instance ID: [{41816b15-69f7-4f0f-8182-54b69d6f8a7a}]. Writer’s state: [VSS_WS_FAILED_AT_PREPARE_SNAPSHOT]. Error code: [0x800423f4].