Re: ReadyNAS NV+ v2 - Cant access shares, failed f/w update etc

StephenB · ‎2024-02-18

@snoofy wrote:

I changes disk 2 back to the old disk and rerun the mdadm command I get

root@readyNAS:~# mdadm --assemble /dev/md2 /dev/sda3 /dev/sdb3 /dev/sdc3 /dev/sdd3
mdadm: cannot open device /dev/sda3: Device or resource busy
mdadm: /dev/sda3 has no superblock - assembly aborted

try running

cat /proc/mdstat

and see if /dev/md2 is listed.

If it isn't, then try

root@readyNAS:~# mdadm --assemble --force /dev/md2 /dev/sdb3 /dev/sdc3 /dev/sdd3

and if that appears to work, try running the cat command again.

If md2 is listed, then try the vgscan bit again.

snoofy · ‎2024-02-18

ok so

root@readyNAS:~# cat /proc/mdstat
Personalities : [linear] [raid0] [raid1] [raid10] [raid6] [raid5] [raid4]
md2 : inactive sda3[1](S) sdc3[4](S) sdd3[2](S) sdb3[0](S)
      11702179554 blocks super 1.2

md1 : active raid1 sdb2[5] sda2[1] sdc2[4] sdd2[2]
      524276 blocks super 1.2 [4/4] [UUUU]

md0 : active raid1 sdb1[4] sda1[1] sdd1[2] sdc1[3]
      4193268 blocks super 1.2 [4/4] [UUUU]

unused devices: <none>

but vgscan wont give me anything but "No volume groups found"

What's interesting though... if I run vgscan with a couple of "-vvv" I see md2 only mentioned once in there (in comparison to md0 and md1)

root@readyNAS:~# vgscan -vv
      Setting global/locking_type to 1
      Setting global/wait_for_locks to 1
      File-based locking selected.
      Setting global/locking_dir to /var/lock/lvm
      Locking /var/lock/lvm/P_global WB
    Wiping cache of LVM-capable devices
      /dev/core: stat failed: No such file or directory
    Wiping internal VG cache
  Reading all physical volumes.  This may take a while...
    Finding all volume groups
      /dev/loop0: size is 0 sectors
      /dev/sda: size is 5860533168 sectors
      /dev/md0: size is 8386536 sectors
      /dev/md0: size is 8386536 sectors
      /dev/md0: No label detected
      /dev/loop1: size is 0 sectors
      /dev/sda1: size is 8388608 sectors
      /dev/sda1: size is 8388608 sectors
      /dev/md1: size is 1048552 sectors
      /dev/md1: size is 1048552 sectors
      /dev/md1: No label detected
      /dev/loop2: size is 0 sectors
      /dev/sda2: size is 1048576 sectors
      /dev/sda2: size is 1048576 sectors
      /dev/md2: size is 0 sectors
      /dev/loop3: size is 0 sectors
      /dev/sda3: size is 5851091825 sectors
      /dev/sda3: size is 5851091825 sectors
      /dev/loop4: size is 0 sectors
      /dev/loop5: size is 0 sectors
      /dev/loop6: size is 0 sectors
      /dev/loop7: size is 0 sectors
      /dev/sdb: size is 5860533168 sectors
      /dev/sdb1: size is 8388608 sectors
      /dev/sdb1: size is 8388608 sectors
      /dev/sdb2: size is 1048576 sectors
      /dev/sdb2: size is 1048576 sectors
      /dev/sdb3: size is 5851091825 sectors
      /dev/sdb3: size is 5851091825 sectors
      /dev/sdc: size is 5860533168 sectors
      /dev/sdc1: size is 8388608 sectors
      /dev/sdc1: size is 8388608 sectors
      /dev/sdc2: size is 1048576 sectors
      /dev/sdc2: size is 1048576 sectors
      /dev/sdc3: size is 5851091825 sectors
      /dev/sdc3: size is 5851091825 sectors
      /dev/sdd: size is 5860533168 sectors
      /dev/sdd1: size is 8388608 sectors
      /dev/sdd1: size is 8388608 sectors
      /dev/sdd2: size is 1048576 sectors
      /dev/sdd2: size is 1048576 sectors
      /dev/sdd3: size is 5851091825 sectors
      /dev/sdd3: size is 5851091825 sectors
  No volume groups found
      Unlocking /var/lock/lvm/P_global

For example, md0 is listed three times

/dev/md0: size is 8386536 sectors
/dev/md0: size is 8386536 sectors
/dev/md0: No label detected

while md2 is only listed once ...

/dev/md2: size is 0 sectors

and

root@readyNAS:~# lvmdiskscan
  /dev/md0 [       4,00 GiB]
  /dev/md1 [     511,99 MiB]
  0 disks
  2 partitions
  0 LVM physical volume whole disks
  0 LVM physical volumes

and

root@readyNAS:~# vgscan --mknodes -vv
      Setting global/locking_type to 1
      Setting global/wait_for_locks to 1
      File-based locking selected.
      Setting global/locking_dir to /var/lock/lvm
      Locking /var/lock/lvm/P_global WB
    Wiping cache of LVM-capable devices
      /dev/core: stat failed: No such file or directory
    Wiping internal VG cache
  Reading all physical volumes.  This may take a while...
    Finding all volume groups
      /dev/loop0: size is 0 sectors
      /dev/sda: size is 5860533168 sectors
      /dev/md0: size is 8386536 sectors
      /dev/md0: size is 8386536 sectors
      /dev/md0: No label detected
      /dev/loop1: size is 0 sectors
      /dev/sda1: size is 8388608 sectors
      /dev/sda1: size is 8388608 sectors
      /dev/md1: size is 1048552 sectors
      /dev/md1: size is 1048552 sectors
      /dev/md1: No label detected
      /dev/loop2: size is 0 sectors
      /dev/sda2: size is 1048576 sectors
      /dev/sda2: size is 1048576 sectors
      /dev/md2: size is 0 sectors
      /dev/loop3: size is 0 sectors
      /dev/sda3: size is 5851091825 sectors
      /dev/sda3: size is 5851091825 sectors
      /dev/loop4: size is 0 sectors
      /dev/loop5: size is 0 sectors
      /dev/loop6: size is 0 sectors
      /dev/loop7: size is 0 sectors
      /dev/sdb: size is 5860533168 sectors
      /dev/sdb1: size is 8388608 sectors
      /dev/sdb1: size is 8388608 sectors
      /dev/sdb2: size is 1048576 sectors
      /dev/sdb2: size is 1048576 sectors
      /dev/sdb3: size is 5851091825 sectors
      /dev/sdb3: size is 5851091825 sectors
      /dev/sdc: size is 5860533168 sectors
      /dev/sdc1: size is 8388608 sectors
      /dev/sdc1: size is 8388608 sectors
      /dev/sdc2: size is 1048576 sectors
      /dev/sdc2: size is 1048576 sectors
      /dev/sdc3: size is 5851091825 sectors
      /dev/sdc3: size is 5851091825 sectors
      /dev/sdd: size is 5860533168 sectors
      /dev/sdd1: size is 8388608 sectors
      /dev/sdd1: size is 8388608 sectors
      /dev/sdd2: size is 1048576 sectors
      /dev/sdd2: size is 1048576 sectors
      /dev/sdd3: size is 5851091825 sectors
      /dev/sdd3: size is 5851091825 sectors
  No volume groups found
    Finding all logical volumes
  No volume groups found
      Unlocking /var/lock/lvm/P_global

🤔🙄

StephenB · ‎2024-02-18

Sounds like something has corrupted the LVM structures. I guess you could try recovery software - perhaps R-Studio

https://www.r-tt.com/