NAS540 data lost on harddisk after factory reset

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  PawelS Posts: 8  Freshman Member

  July 2020

  1. I didnt Mount them as I don't know why. I will try later. 
  2. Power loss did that. 

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  PawelS Posts: 8  Freshman Member

  July 2020

  Should I use command exactly as you posted? 

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  Mijzelf Posts: 2,989  Guru Member

  

  July 2020

  There are variations possible, but this should work.
  

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  PawelS Posts: 8  Freshman Member

  July 2020

  i did it.
  
  last out put is:
  

  md3: detected capacity change from 0 to 995973988352

   md2: unknown partition table

   md3: unknown partition table

  bio: create slab <bio-2> at 2

  EXT4-fs (dm-3): ext4_check_descriptors: Checksum for group 128 failed (62833!=0)

  EXT4-fs (dm-3): group descriptors corrupted!

  Rounding down aligned max_sectors from 4294967295 to 4294967288

  EXT4-fs (dm-1): warning: mounting fs with errors, running e2fsck is recommended

  EXT4-fs (dm-1): recovery complete

  EXT4-fs (dm-1): mounted filesystem with ordered data mode. Opts: (null)

  ~ #

  
  

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  PawelS Posts: 8  Freshman Member

  July 2020

  And still did not get my folders.
  
  

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  PawelS Posts: 8  Freshman Member

  July 2020

  how should i mount second disk?
  
  

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  Mijzelf Posts: 2,989  Guru Member

  

  July 2020

  And still did not get my folders.

  You should be able to see (part of) your folders in /tmp/mountpoint:

  ls -l /tmp/mountpoint/

  how should i mount second disk?

  Basically the same. But you need to use a different mountpoint
  

  
  

  mkdir /tmp/mountpoint2

  mount /dev/dm-3 /tmp/mountpoint2

  dmesg | tail
  

  
  

  But I don't know if it will happen. Something is wrong with dm-3, and I don't know what that means:

  
  

  EXT4-fs (dm-3): ext4_check_descriptors: Checksum for group 128 failed (62833!=0)
  EXT4-fs (dm-3): group descriptors corrupted!
  Rounding down aligned max_sectors from 4294967295 to 4294967288
  

  
  
  

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