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We once had a RAID1 array on a DNS-321, our world was roses. But we wished to perform backups of our data.
Now we have switched to a DNS-323 to utilise the built in USB port to perform backups off the unit.
How do we rebuild the RAID1 array again?
Currently, it recognises two ordinary discs.
We've tried: #> mdadm --assemble --scan
but /etc/mdadm.conf does not exist.
We've tried: #> mdadm --assemble /dev/md0 /dev/sda2 /dev/sdb2
but it complains that /dev/sda2 is busy and that /dev/sda2 has no superblock.
We've tried: #> mdadm --build /dev/md0 --level=raid1 --raid-devices=2 /dev/sda2 /dev/sdb2
but it complains that /dev/sda2 is busy
Any help would be greatly appreciated.
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