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Two identical SSD disks of 4 TB.

Linux Mint installed on first disk, with 3 partitions being automatically created during fresh installation:

  • /dev/sda1 BIOS Boot;
  • /dev/sda2 EFI System mounted on /boot/efi;
  • /dev/sda3 Linux LVM i.e. LVM2 Physical Volume (LVM2 001).

Second disk /dev/sdb1 Linux LVM i.e. LVM2 Physical Volume (LVM2 001).

Eventually, I merged LVM volume groups, so that all logical volumes are now part of vgmint volume group.
Volumes:

  • /dev/vgmint/root --->from disk1
  • /dev/vgmint/swap_1 ---> from disk1
  • /dev/vgmint/volume ---> from disk2

What I want to do now is to merge /dev/vgmint/volume into /dev/vgmint/root so that /dev/vgmint/root remains only, taking full available space from both disks.

Is this possible and how?

I want /dev/vgmint/volume to dissapear and its space being merged into /dev/vgmint/root.

In other words, I want to completely utilize both physical disks as one disk, I don't want separate mounted folders, but rather extend the Linux system folders over both SSD disks. How to accomplish that?

If this is not possible on existing system, is there a way to do it by fresh linux system install, can it be installed over 2 physical disks?

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Yes, this is possible. The steps are:

  1. backup files from volume /dev/vgmint/volume
  2. unmount it umount /dev/vgmint/volume
  3. remove logical volume lvremove /dev/vgmint/volume
  4. extend the volume and filesystem lvextend --resizefs -L+100%FREE /dev/vgmint/root
  5. restore backuped files (if any)

P.S. I am not sure if the last command will work with xfs. If not you should (for point 4) first execute lvextend -L+100%FREE /dev/vgmint/root and then xfs_grow /dev/vgmint/root

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    Re works with xfs: I sure hope it does, it's exactly how I deal with my xfs lvs. (So, yes, it does work.) Commented Jan 13, 2023 at 14:30
  • @MarcusMüller, thank you for the update. Was not sure. Usually I first extend the volume and then (by hand) extend the filesystem :) Commented Jan 13, 2023 at 14:36
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    Is it lvresize or lvextend? Commented Jan 13, 2023 at 14:40
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    @zlatko, my mistake, should be lvextend. Will edit the answer :) Commented Jan 13, 2023 at 14:42
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    One is used for sizes in terms of LVM extents, the other for canonical data units. I always forget which is which. Commented Jan 13, 2023 at 16:28

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