My RAID (RAID1,RAID5,RAID6) is in degraded mode. What should I do?
Last modified date:
2020-09-09
When a RAID (RAID1,RAID5,RAID6) is in degraded mode it means one or more disks have failed. In this case it is highly advised to replace the faulty disk as soon as possible to avoid any data loss.
You should hot-swap the faulty disk without turning the NAS off. Here’s how:
- Prepare a new hard drive to rebuild the RAID configuration. The new drive should have at least the same capacity as the failed drive.
- Remove the faulty drive from the NAS.
- Install the new drive into the NAS. You will hear a beep for 1.5 seconds twice. The Status LED will alternate between flashing red and green.
- If you check the RAID Group information in the Storage Pool or Static Volume manage window, the status will be Rebuilding and the progress will be shown. If this does not happen automatically, please keep reading below.
- When the rebuilding is completed, the Status LED will be in green and the volume status will change to Ready.
In some cases the rebuild of the RAID might not start automatically. If you encounter this you may set the new drive as a spare disk first. The rebuild will start immediately after this is done.
To set the new drive as a spare disk, please follow the steps below:
- Log in to your NAS via web browser
- Open Storage & Snapshots
- Go to Storage > Storage/Snapshots
- Select your Storage Pool or Static Volume and click on the “Manage” button
- Select the degraded RAID group section and click “Manage” and then “Configure Spare Disk”.
- Select the new drive and click Apply
Your RAID will now start rebuilding and normal operation will be resumed after it’s completed.
