After getting a new Commvault V11, when tried to backup a windows server 2008 R2, getting "Failed Unable to quiesce guest file system during snapshot creation".
Reason:This issue occurs if there is a conflict between
the Microsoft based volume shadow copy services and VMware snapshot
To resolve this issue, use any one Quiescing tool.
As VMware snapshot provider is only used for snapshot / Quiesing purposes, this
can be disabled.
1. Stop and Disable VMware snapshot provider
2. Start and set VSS to Automatic / Manual
3. Restart Virtual disk service and then attempt to create a
manual Quiesced snapshot.