Non-technical user need help NAS540 RAID5 not restoring

PuraVida

Hello,

Requesting help please. I'm a non-technical user and my NAS540 is a 4-bay RAID5 setup with 6-TB drives. I'm on a Windows 10 PC. Disk 2 was degraded. I purchased a new 6-TB drive. Placed in and click restore from the storage manger. It sync'd a few percentage and then failed. Now it is saying Danger and There is no more disk group volume. Volume can't be managed. Is there no option to fix this?

See screenshots.

Mijzelf

What does 'Non-technical user' mean here? When only using the webinterface the only way out I can think of is delete the volume and start over. But as you have 16TB of data on that volume, I can imagine that is not a wanted action.

To solve this in another way you'll first have to find out what the actual problem is. Unfortunately the webinterface doesn't really tell.

Enable the ssh server (somewhere in the network settings), login over ssh (in a Windows command prompt

ssh admin@<nas>

where <nas> is either the IP address of the NAS, or the hostname.)

and post the output of the commands

cat /proc/mdstat
su
mdadm —examine /dev/sd[abcd]1
mdadm —examine /dev/sd[abcd]2

That will show the status of the raid array, and the raid headers of all members.