My RAID is in degraded read-only mode. What should I do?
If a RAID is in degraded read-only mode it means more than the allowed number of drives have failed and the RAID can’t be rebuilt even if you replace the faulty drives.
|
RAID Configuration |
The Maximum Number of Drives Allowed to Fail |
|
RAID 5 |
1 |
|
RAID 6 |
2 |
|
RAID 10 |
2 |
The RAID pool and volumes will be put in read-only mode by the system to stop any accidental data corruption. The data should be backed up to another location as soon as possible. Follow the steps as below:
-
Backup all the data stored on the faulty RAID.
-
After backup is finished, remove the volumes and/or pool on the faulty RAID volume.
Note: All data will be removed, make sure the data has been backed up. -
Replace all the faulty HDDs.
-
Create a new RAID on storage pool or static volume.
-
Restore the data to the new volume.
