I recently lost my NAS and am trying to recover the data in my RAID. The disks are fine, its just the NAS hardware that stopped booting and I can't get any support as its discontinued.
I attached the disks to my Ubuntu machine and can see the following info:
sudo mdadm --detail /dev/md126 /dev/md126: Version : 1.2 Creation Time : Sun Jan 10 09:57:09 2016 Raid Level : raid5 Array Size : 8776244352 (8.17 TiB 8.99 TB) Used Dev Size : 2925414784 (2.72 TiB 3.00 TB) Raid Devices : 4 Total Devices : 4 Persistence : Superblock is persistent Update Time : Fri May 6 07:03:58 2022 State : clean Active Devices : 4 Working Devices : 4 Failed Devices : 0 Spare Devices : 0 Layout : left-symmetric Chunk Size : 64K Consistency Policy : resync Name : 0e342a28:data-0 UUID : c1d1d0bb:08037d20:54ea1137:054d8bb7 Events : 748 Number Major Minor RaidDevice State 0 8 67 0 active sync /dev/sde3 1 8 51 1 active sync /dev/sdd3 2 8 35 2 active sync /dev/sdc3 3 8 19 3 active sync /dev/sdb3
However, mdadm.config is emtpy and running the usual --scan commands doesn't return any results. I have tried using -assamble while passing on all disks as parameters but I get this result:
sudo mdadm --assemble /dev/md126 /dev/sdb3 /dev/sdc3 /dev/sdd3 /dev/sde3mdadm: /dev/sdb3 is busy - skipping mdadm: /dev/sdc3 is busy - skipping mdadm: /dev/sdd3 is busy - skipping mdadm: /dev/sde3 is busy - skipping
I just want to get it mounted so that I can copy the data to the new NAS. Can anyone help with this?
Edit 1: as per suggestion in comments, I have checked it with file:
sudo file -sL /dev/md126 /dev/md126: BTRFS Filesystem label "0e342a28:data", sectorsize 4096, nodesize 32768, leafsize 32768, UUID=d9f1e416-0a37-4425-9037-a35e229ba477, 8453121372160/8986874216448 bytes used, 1 devices