NAS326: Restore Deleted JBOD Volume

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  SpamMaster50000 Posts: 15  Freshman Member

  

  November 2022

  So i guess it's testdisk now... Or do you see something where i made an error?

  
  

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  Mijzelf Posts: 2,930  Guru Member

  

  November 2022

  SpamMaster50000 said:

  So i guess it's testdisk now... Or do you see something where i made an error?

  
  

  When using --build, you'll have to provide a --data-offset=16, else the raid header space will be used as well.
  
  

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  SpamMaster50000 Posts: 15  Freshman Member

  

  November 2022

  Hmm, not good

  
  

  the problem was that my version of mdadm doesn't yet know the data offset option

  
  

  ~ # mdadm --build --assume-clean --level=linear --raid-devices=2 --rounding=64K --data-offset=16 /dev/md2 /dev/sda3 /dev/sdb3
  mdadm: unrecognized option '--data-offset=16'
  Usage: mdadm --help
    for help
  
  

  
  

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  SpamMaster50000 Posts: 15  Freshman Member

  

  November 2022

  Can i use losetup instead?
  

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  Mijzelf Posts: 2,930  Guru Member

  

  November 2022

  SpamMaster50000 said:

  Can i use losetup instead?
  

  Good thinking! Yes, that should be possible.

  losetup /dev/loop1 -o 8192 /dev/sda3
  

  losetup /dev/loop2 -o 8192 /dev/sdb3

  mdadm --build <arguments> /dev/md2 /dev/loop1 /dev/loop2
  

  
  

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