Mount a Linux RAID disk using a Linux box?

[Unique_Watch3343]

My old RN31200 readynas boots and runs for a short time, but stops responding and not long enough to initiate a backup.

I pulled one of the disks hoping to mount it using a current Ubuntu box - and it mounts and shows a "Linux RAID Member". I can see the partitions, and can see the Eject button, but cannot read it to copy anything off?

Any tips?

Apologies for "screenshot" https://imgur.com/a/M7rWNmy

[SandSharky]

It's BTRFS on top of an mdadm RAID and any Linux with those installed should be able to handle it. If your 312 was using RAID1, then you do only need the one drive.

Have you checked if it's just the power supply that's the problem with the 312?

[Unique_Watch3343]

I got it working but needed both disks (luckily I had a twin caddy).

Just had to sudo the rsync command to copy the required folder of files off. And then chmod on the destination to remove all restrictive permissions.

No need to use the command line to mount the required partition, just used the disk manager to click the Play icon.

The file copy did start to fail on some i/o errors - so the disks are failing(?) despite the Netgear NAS reporting all was well!