What should I do if I see a disk error or storage related warning message?
Last modified date:
2023-07-28
Applicable Products
QTS, QuTS hero
Procedure
Identify the issue
- Go to Storage & Snapshots > Storage > Disks/VJBOD.
- Identify and select any drives with Warning or Error statuses.
- Run a Bad Block scan on the selected disks.
If you consistently encounter any of the following alerts, the disks should be replaced.
- Status message: Warning (Degraded)
- System log entry: Disk drive X failed or is unplugged
- System log entry: Host: Disk X: Medium error. Run a bad block scan on the drive. Replace the drive if the error persists shows in System logs.
- System log entry: [Disk S.M.A.R.T.] Host: Disk x still has warning/error condition. Please check the summary page
Replace faulty disks
Your next steps depend on the number of faulty disks and your RAID group:
- Number of faulty disks doesn't exceed the fault tolerance: You can replace disks using the following process.
- Number of faulty disks does exceed the fault tolerance:
- You can still access the data using FileStation: You should back up data to a separate location before replacing the disk.
- You can't access the data using FileStation: You can't recover the data in the storage pool.
- Go to Storage & Snapshots > Storage> Disks/VJBOD and check the disk slot status.
- Without shutting off the NAS, remove a disk and wait for the NAS to send an alert beep.
- Insert a new disk.
- On the Disks/VJBOD page, check that the new disk is detected by the NAS.
- If the new disk is detected, but the RAID rebuild process doesn't start, configure the new disk as a spare disk.
- If the new disk isn't detected, perform the following steps:
- Remove the new disk and leave the slot empty.
- Reboot the NAS,
- Restart this procedure from step 1.
- Go to Storage & Snapshots > Storage > Storage/Snapshot.
- Watch for the following issues during and after the rebuilding process:
- If the RAID becomes degraded and read-only during RAID rebuilding, see the Read-only errors section below.
- If the RAID rebuilding keeps skipping, it may indicate another faulty disk. Backup your data to another device as soon as possible.
- After the rebuild process finishes, if a disk failure error occurs on the same disk slot, confirm the disk health by connecting the disk to a PC and running a disk diagnostic tool.
Not Active errors
If you consistently encounter the following alert, it indicates that the RAID group can’t be assembled automatically.- Status message: RAID x - Not Active
This usually occurs if the number of faulty disks exceeds the fault tolerance for the RAID group or if the RAID information isn't consistent for every disk. To resolve this issue, you can try the following procedure:
- Ensure that the disks haven't been replaced or removed.
- Log in to the NAS as an administrator.
- Go to Storage & Snapshots > Storage > Storage/Snapshots.
- Double-click the relevant storage pool/static volume.
- Go to Manage > Recover RAID Group.
- Wait for the volume to be recovered.
- Back up the data to another device.
- Replace the faulty drives and reinitialize the NAS.
- Copy the data back to the NAS.
If this process doesn't recover your data, contact QNAP support from the QNAP Service Portal. Do not change the disks or remove them. Depending on your situation, your data may not be recoverable.
Read-only errors
If you consistently encounter any of the following alerts, it may indicate a larger issue:- Status message: Warning (Degraded - Readonly)
- System log entry: RAID group X is degraded, the RAID group has been set to read-only. Back up all the files immediately.
