How to recover from a WD Live Duo Mirrored RAID
These steps are cobbled together from various sources on the web.
- Get a USB SATA enclosure. The one I got said it supported drives of up to 2tb, it had no problem mounting a 3tb drive.
- Take one of the drives (doesn’t matter which) from the WD Live Duo enclosure and mount it in the new enclosure.
- Plug the newly-mounted disk and a second external disk (to recover to) into your Linux box. I just used a Raspberry Pi.
- Log in as root
- Make folder to copy data into ‘mkdir /mnt/dest’
- My spare disk was Ntfs so I needed a driver for that;
‘apt-get install ntfs-3g’
- Mount your destination disk -
‘mount -t ntfs-3g /dev/sda1′
- Check your disks with ‘parted -l’ – you should see something like
- 1 4624MB 3001GB 2996GB ext4 primary*
- Note the drive id above this entry, in my case it was/dev/sdc
- start debugfs (note the large sector size setting of 65536)*debugfs
debugfs: open -b 65536 /dev/sdb4
debugfs: cd /shares/Public
debugfs: cd ..
debugfs: rdump Public /mnt/dest/
- Handy trick when debugfs is running; ctrl-z to suspend it, ‘bg’ to start it again and ‘disown -h %1′ to detach it from the terminal process
- ‘ls /mnt/dest/ | wc -l’ will show updated copies