NTFS has reported that the Cluster Shared Volume is either corrupted or completely unavailable. Some data stored on the volume may be inaccessible.
Check the status of your hardware for any failures (for example, a disk, controller, cabling failure). In most cases, the system log contains additional events from the lower-level storage drivers that indicate the cause of the failure.
After you have isolated and resolved the hardware problem:
Open the Disk Management snap-in.
Rescan the disks and then reactivate any disks with errors.
Run chkdsk on any reactivated volumes.