Why mon pods fail to start due to unable to mount PVC in OCS 4.x ?

Issue

• When snapshots was taken for OCS VMs on vmware environment, during OCS upgrade mon pods fails to start.

• ceph-mon pod reporting AttachVolume.Attach failure for PVC

    Warning  FailedMount         8m33s (x20 over 4h22m)  kubelet, rhocs4.redhat.com  Unable to attach or mount volumes: unmounted volumes=[ceph-daemon-data], unattached volumes=[rook-ceph-log rook-ceph-crash ceph-daemon-data default-token-lxfxr rook-config-override rook-ceph-mons-keyring]: timed out waiting for the condition
    Warning  FailedMount         3m37s (x24 over 4h6m)   kubelet, rhocs4.redhat.com  Unable to attach or mount volumes: unmounted volumes=[ceph-daemon-data], unattached volumes=[ceph-daemon-data default-token-lxfxr rook-config-override rook-ceph-mons-keyring rook-ceph-log rook-ceph-crash]: timed out waiting for the condition
    Warning  FailedAttachVolume  69s (x68 over 152m)     attachdetach-controller                   AttachVolume.Attach failed for volume "pvc-111111111-2222-3333-4444-555555666666" : Failed to add disk 'scsi1:2'.