NTFS has reported that the logical disk is either corrupted or completely unavailable. Some data stored on the volume may be inaccessible.
A logical disk may become corrupted or inaccessible due to a number of reasons some of which include:
A physical disk related to the logical disk has been removed or failed
A physical disk related to the logical disk has become corrupt (for example; bad sectors) or inoperable
The disk driver may've encountered an issue
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:
1. Open the Disk Management snap-in.
2. Rescan the disks and then reactivate any disks with errors.
Resynchronize or regenerate the volume as necessary if the disk was a member of a mirrored or RAID-5 volume.
3. Run chkdsk on any reactivated volumes.