we have Linux machine redhat 7.2 LVM disk

disk -sdd with only 2G

we want to extend the size of /data to 20G by adding another disk - sde

/dev/sdd            2.0G  9.2M  1.9G   1% /data

expected results

/dev/sdd            20.0G  9.2M  1.9G   1% /data

what is the procedure that explain how to add another disk and join the new disk size to "sdd" ?


It does not look like your /dev/sdd is a member of LVM Group. You cannot just extend your device. Expected result is not able to be done.

By the subject, I can assume, you would like to use LVM to extend /dev/sdd and keep your data from /dev/sdd on /dev/sdd and /dev/sde at /data mount-point.

If so, the procedure looks like that:

  • Do reliable the backup of /data.
  • Create physical-volume from /dev/sdd. (It will wipe-out your data from /dev/sdd)
  • Create physical-volume from /dev/sde (It will wipe-out your data from /dev/sde)
  • Create volume-group that consists of two PVs: /dev/sdd and /dev/sde.
  • Create linear logical-volume, create filesystem on it, mount it on /data.
  • Restore your backup.


  • thank you , can you please described how to Create physical-volume , Create volume-group , Create linear logical-volume ( or just explain by commands the steps , – yael Jan 2 '18 at 8:35
  • Have a look at pvcreate vgcreate lvcreate commands. – user263770 Jan 2 '18 at 8:40
  • do we need to umount the mount point from sdd when we do pvcreate> – yael Jan 2 '18 at 8:42

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