Removing/Adding drives from the array using command line

    • OMV 4.x

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    • What I do is first I fail the drive in the array and then I remove it and then I shred it and then I assemble using the new one. You may need to change the SDC and MD, int he example below I remove C and add Q to md127 with a and b already in it.

      mdadm --fail /dev/md127 /dev/sdc
      mdadm --remove /dev/md127 /dev/sdc
      shred -v -n 1 /dev/sdc
      mdadm --assemble /dev/md127 /dev/sd[abq] --verbose --force


      If you need to unmount and stop the array:
      umount /dev/md127
      mdadm --stop /dev/md127

      Good luck, please be aware that you can lose all of your raid if not done properly.
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