Extend LVM size

Question

I recently cloned my ubuntu from a 250GB SSD to my new 2TB SSD. It automatically created an LVM with 248GB with my root filesystem in it. I would like to resize the LVM to full 2TB.

nvme0n1             259:1    0   1.8T  0 disk 
├─nvme0n1p1         259:7    0   512M  0 part /boot/efi
└─nvme0n1p2         259:8    0   1.8T  0 part 
  ├─vgubuntu-root   253:0    0 231.4G  0 lvm  /
  └─vgubuntu-swap_1 253:1    0   976M  0 lvm  [SWAP]

However the PSize is only 250 GB, rather than 2TB fromsudo pvs

PV             VG       Fmt  Attr PSize   PFree
  /dev/nvme0n1p2 vgubuntu lvm2 a--  232.38g    0

I see the following output from lvdisplay:

--- Logical volume ---
  LV Path                /dev/vgubuntu/root
  LV Name                root
  VG Name                vgubuntu
  LV UUID                0wM6pq-o26o-qVBf-1x61-vFbP-Poyf-fFW3f7
  LV Write Access        read/write
  LV Creation host, time ubuntu, 2021-04-24 06:13:08 +0800
  LV Status              available
  # open                 1
  LV Size                <231.43 GiB
  Current LE             59246
  Segments               2
  Allocation             inherit
  Read ahead sectors     auto
  - currently set to     256
  Block device           253:0

I tried the following lvextend command but it does not extend beyond 248GB size:

lvextend -l +100%FREE /dev/vgubuntu/root/

with the output:

  New size (59246 extents) matches existing size (59246 extents).

Can someone please advise?

Thanks.

Jeffrey

Welcome to AskUbuntu! Can you please [edit](https://askubuntu.com/posts/1406697/edit) your question and add the output of `lvdisplay`? A lot of the time the lvname is different than what you see when you run like `lsblk` or `df`. What we are looking for is the name associated with `LV Path`. — Terrance, May 05 '22 at 03:15
Can you please do one more edit and add the output of `vgdisplay vgubuntu`? — Terrance, May 05 '22 at 13:40
Ah, I also missed something here. Your `pvs` states 0 free space. You need to extend out `nvme0n1p2` partition size. See https://askubuntu.com/questions/877743/cannot-extend-lvm-partition?rq=1 — Terrance, May 05 '22 at 15:37
Thanks Terrance. I just reinstalled my Ubuntu yesterday and it is working fine now. — Jeff0129, May 06 '22 at 03:52

score 6 · Answer 1 · answered May 06 '22 at 05:23

Looks like what you need is growpart. I'm not sure which steps you already did. Here is what I did on a similar machine:

Before storage expansion, this is what I have

root@agw:~# lsblk /dev/vda
NAME                 MAJ:MIN RM  SIZE RO TYPE MOUNTPOINTS
vda                  252:0    0   20G  0 disk 
├─vda1               252:1    0    1M  0 part 
├─vda2               252:2    0  513M  0 part /boot/efi
└─vda3               252:3    0 19.5G  0 part 
  ├─vgxubuntu-root   253:0    0 18.5G  0 lvm  /
  └─vgxubuntu-swap_1 253:1    0  976M  0 lvm  [SWAP]
  
root@agw:~# vgs
  VG        #PV #LV #SN Attr   VSize  VFree
  vgxubuntu   1   2   0 wz--n- 19.49g    0

I added 2G to the underlying disk. You'll see vda now has 22G of space, while vda3 is not automatically using all the space.

root@agw:~# lsblk /dev/vda
NAME                 MAJ:MIN RM  SIZE RO TYPE MOUNTPOINTS
vda                  252:0    0   22G  0 disk 
├─vda1               252:1    0    1M  0 part 
├─vda2               252:2    0  513M  0 part /boot/efi
└─vda3               252:3    0 19.5G  0 part 
  ├─vgxubuntu-root   253:0    0 18.5G  0 lvm  /
  └─vgxubuntu-swap_1 253:1    0  976M  0 lvm  [SWAP]
  
root@agw:~# vgs
  VG        #PV #LV #SN Attr   VSize  VFree
  vgxubuntu   1   2   0 wz--n- 19.49g    0

After expanding vda3, run lvextend and resize2fs (if you're on ext4).

root@agw:~# growpart /dev/vda 3
CHANGED: partition=3 start=1054720 old: size=40888287 end=41943007 new: size=45082591 end=46137311

root@agw:~# pvs
PV         VG        Fmt  Attr PSize  PFree
/dev/vda3  vgxubuntu lvm2 a--  21.49g 2.00g

root@agw:~# lvextend -l+100%FREE /dev/vgxubuntu/root
  Size of logical volume vgxubuntu/root changed from <18.54 GiB (4746 extents) to <20.54 GiB (5258 extents).
  Logical volume vgxubuntu/root successfully resized.
  
root@agw:~# df -hPT /
Filesystem                 Type  Size  Used Avail Use% Mounted on
/dev/mapper/vgxubuntu-root ext4   19G   11G  7.2G  59% /

root@agw:~# resize2fs /dev/mapper/vgxubuntu-root
resize2fs 1.46.5 (30-Dec-2021)
Filesystem at /dev/mapper/vgxubuntu-root is mounted on /; on-line resizing required
old_desc_blocks = 3, new_desc_blocks = 3
The filesystem on /dev/mapper/vgxubuntu-root is now 5384192 (4k) blocks long.

root@agw:~# df -hPT /
Filesystem                 Type  Size  Used Avail Use% Mounted on
/dev/mapper/vgxubuntu-root ext4   21G   11G  9.1G  53% /

Works for me, but a little change. `/dev/vda` -> `/dev/sda`, `/dev/vgxubuntu/root` -> `/dev/ubuntu-vg/ubuntu-lv`, `/dev/mapper/vgxubuntu-root` -> `/dev/mapper/ubuntu--vg-ubuntu--lv` — hideDragon, Jun 03 '23 at 02:32

score 3 · Answer 2 · answered May 05 '22 at 03:36

3

You are close to extending it. The name we were looking for is what the LV Path states from the command of lvdisplay. LV Path shows the name as /dev/vgubuntu/root.

The command to extend it should be:

lvextend -l +100%FREE /dev/vgubuntu/root

answered May 05 '22 at 03:36

Terrance

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Yes I tried the name `/dev/vgubuntu/root` too. It showed the same output which could not extend beyond the 250GB size: `New size (59246 extents) matches existing size (59246 extents). ` – Jeff0129 May 05 '22 at 03:52

Extend LVM size

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