Degraded volumes

RAID 1

A RAID 1 volume is reported as degraded when one of its members is disconnected or has failed. Data mirroring and redundancy are lost because the system can only use the functional member.

RAID 5

A RAID 5 volume is reported as degraded when one of its members is disconnected or has failed. When two or more array disks are disconnected or have failed, the volume is reported as failed.

RAID 10

A RAID 10 volume is reported as degraded when one of its members is disconnected or has failed, or when two non-adjacent members are disconnected or have failed. When two or more array disks are disconnected or have failed, the volume is reported as failed.

Cause 1

Missing array disk.

Solution 1

If the user can reconnect the missing disk, follow this procedure to rebuild the volume:

  1. Power off the user’s computer and reconnect the missing disk.

  2. Turn on the user’s computer and the rebuild operation will start automatically.

If the user cannot reconnect the missing disk and a NVMe or SATA disk is available and normal, follow this procedure to rebuild the volume:

  1. Select the disk the user wants to use to rebuild the volume, and then click Rebuild.

  2. The rebuild operation starts immediately. The user can follow the progress by hovering over the notification area icon or by reviewing the volume status under 'Status' or 'Manage'.

  3. Once the operation has successfully completed, the array disk and volume status will display as 'Normal'.

NOTE:

If there is no available disk present, the user will need to power off the user’s computer and connect a new NVMe or SATA disk that is at an equal or greater capacity than the failed disk. Once the user’s computer is back up and running the user can follow the rebuild procedure described previously.

Cause 2

Failed array disk.

Solution 2

We recommend that the user rebuild the degraded volume to a new disk to return the volume and overall storage system status to normal. However, the user can try resetting the disk to normal, which will prompt the volume to start rebuilding automatically. But if the read/write data access consistently fails, the disk will likely return to a failed state immediately and the user will need to rebuild the volume to another disk.

If a NVMe or SATA disk is compatible, available and normal, rebuild the volume:

  1. Under 'Status', click Rebuild to another disk.

  2. Select the disk the user wants to use to rebuild the volume, and then click Rebuild.

  3. The rebuild operation starts immediately. The user can follow the progress by hovering over the notification area icon or by reviewing the volume status under 'Status' or 'Manage'.

  4. Once the operation successfully completed, the array disk and volume status will display as 'Normal'.

NOTE:

If there is no available disk present, the user will need to power off the user’s computer and connect a new NVMe or SATA disk that is at an equal or greater capacity than the failed disk. Once the user’s computer is back up and running the user can follow the rebuild procedure described previously.