1911 A volume group snapshot is degraded because a medium error that could not be tracked.

Explanation

The volume group snapshot no longer matches the volume group and may no longer be a consistent point in time copy of the volume group that means a volume snapshot of the volume group snapshot is no longer available.

User response

  1. Firstly fix all higher priority errors especially those which are indicating data loss/corruption.
  2. If the snapshot is no longer needed it can be removed and that error will be fixed automatically.