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How to fix Disk status become degrade

By: Author Alex Lim

Posted on

Categories Troubleshooting

This article describes how to fix the status of a disk that changed from ok to degrade.

Scope

FortiAnalyzer / FortiManager Hardware.

Solution

When running a disk health check, it detected one of the disks that became degraded.

### RAID inf
Mega RAID:
RAID Level: Raid-50
RAID Status: Degraded
RAID Size: 27939GB
File System: ext4 27501GB
Groups: 2

Disk 0: OK 2793GB Group-1
Disk 1: OK 2793GB Group-1
Disk 2: OK 2793GB Group-1
Disk 3: OK 2793GB Group-1
Disk 4: Failed 2793GB
Disk 5: OK 2793GB Group-1
Disk 6: OK 2793GB Group-2

Steps to follow:

  1. Remove the affected hard disk.
  2. Re-add the disk-affected hard disk to the slot.
  3. After re-adding the disk-affected, check the disk status if it is ‘unused’ or ‘degraded’.
  4. If the status changed to ‘unused’, run the CLI and execute raid add-disk <disk no.> (to add the disk manually).
  5. The disk will show rebuild and will take less than 24 hours to complete.
  6. After the complete rebuild, check the disk health.
  7. If the status changes to ‘degrade’, it is necessary to perform an RMA for the disk affected.

This is possible for removable disks from hardware.

This action can be performed when the devices are On or Offline Mode.

It does not need to perform times windows while performing troubleshooting.