Recovering a 6 drive RAID 5 array using two disks – unknown filesystem type ‘linux_raid_member’ with mdadm

Hello askubuntu forums,

I’m trying to recover data from a 6 drive NAS set up. I’ve tried using mdadm to examine, configure, and mount some drives from this array, but nothing is working. I’ve got two of the drives plugged into an USB drive mount.

I can see what partition has data using fdisk. Anytime I’ve tried to mount anything though it will either tell me “Unknown filesystem type ‘linux_raid_member'” or tell me that the drive is already active. Been trying to do this all day and I’m hoping someone here can help me out. Thanks in advance.

root@jake-ThinkPad-W541:/home/test# mdadm --query /dev/sdc8 /dev/sdc8: is not an md array /dev/sdc8: device 1 in 6 device undetected raid5 /dev/md/8.  Use mdadm --examine for more detail. root@jake-ThinkPad-W541:/home/test# mdadm --examine /dev/sdc8 /dev/sdc8:           Magic : a92b4efc         Version : 1.0     Feature Map : 0x0      Array UUID : 647bf344:1fa055b2:250192e1:f58cf57e            Name : vg:8   Creation Time : Wed Apr  1 22:54:11 2015      Raid Level : raid5    Raid Devices : 6   Avail Dev Size : 9749841648 (4649.09 GiB 4991.92 GB)      Array Size : 24374602240 (23245.43 GiB 24959.59 GB)   Used Dev Size : 9749840896 (4649.09 GiB 4991.92 GB)    Super Offset : 9749841904 sectors    Unused Space : before=0 sectors, after=1008 sectors           State : clean     Device UUID : 1f16d5b6:b82ce930:c52f61f7:df644373      Update Time : Tue Jun  4 00:52:09 2019        Checksum : c6070a4 - correct          Events : 201           Layout : left-symmetric      Chunk Size : 512K     Device Role : Active device 1    Array State : AAAAAA ('A' == active, '.' == missing, 'R' == replacing) 
  • John