[SOLVED] ZFS resize not "seen" in Debian 11 VM

[nicoska]

As the title, I've resized my ZFS disk to 1,5TB (from 1TB):



But here is what the VM get:



Any idea? here is the output of zfs get

root@nicoska:~# zfs get all DueTB/vm-103-disk-0
NAME                 PROPERTY              VALUE                  SOURCE
DueTB/vm-103-disk-0  type                  volume                 -
DueTB/vm-103-disk-0  creation              Sun Feb 12  1:12 2023  -
DueTB/vm-103-disk-0  used                  964G                   -
DueTB/vm-103-disk-0  available             834G                   -
DueTB/vm-103-disk-0  referenced            964G                   -
DueTB/vm-103-disk-0  compressratio         1.00x                  -
DueTB/vm-103-disk-0  reservation           none                   default
DueTB/vm-103-disk-0  volsize               1.47T                  local
DueTB/vm-103-disk-0  volblocksize          8K                     default
DueTB/vm-103-disk-0  checksum              on                     default
DueTB/vm-103-disk-0  compression           on                     inherited from DueTB
DueTB/vm-103-disk-0  readonly              off                    default
DueTB/vm-103-disk-0  createtxg             9038                   -
DueTB/vm-103-disk-0  copies                1                      default
DueTB/vm-103-disk-0  refreservation        none                   local
DueTB/vm-103-disk-0  guid                  6152953672542789993    -
DueTB/vm-103-disk-0  primarycache          all                    default
DueTB/vm-103-disk-0  secondarycache        all                    default
DueTB/vm-103-disk-0  usedbysnapshots       0B                     -
DueTB/vm-103-disk-0  usedbydataset         964G                   -
DueTB/vm-103-disk-0  usedbychildren        0B                     -
DueTB/vm-103-disk-0  usedbyrefreservation  0B                     -
DueTB/vm-103-disk-0  logbias               latency                default
DueTB/vm-103-disk-0  objsetid              2072                   -
DueTB/vm-103-disk-0  dedup                 off                    default
DueTB/vm-103-disk-0  mlslabel              none                   default
DueTB/vm-103-disk-0  sync                  standard               default
DueTB/vm-103-disk-0  refcompressratio      1.00x                  -
DueTB/vm-103-disk-0  written               964G                   -
DueTB/vm-103-disk-0  logicalused           960G                   -
DueTB/vm-103-disk-0  logicalreferenced     960G                   -
DueTB/vm-103-disk-0  volmode               default                default
DueTB/vm-103-disk-0  snapshot_limit        none                   default
DueTB/vm-103-disk-0  snapshot_count        none                   default
DueTB/vm-103-disk-0  snapdev               hidden                 default
DueTB/vm-103-disk-0  context               none                   default
DueTB/vm-103-disk-0  fscontext             none                   default
DueTB/vm-103-disk-0  defcontext            none                   default
DueTB/vm-103-disk-0  rootcontext           none                   default
DueTB/vm-103-disk-0  redundant_metadata    all                    default
DueTB/vm-103-disk-0  encryption            off                    default
DueTB/vm-103-disk-0  keylocation           none                   default
DueTB/vm-103-disk-0  keyformat             none                   default
DueTB/vm-103-disk-0  pbkdf2iters           0                      default

And here the output zfs list

root@nicoska:~# zfs list -t all -o space
NAME                 AVAIL   USED  USEDSNAP  USEDDS  USEDREFRESERV  USEDCHILD
DueTB                 834G   964G        0B     96K             0B       964G
DueTB/vm-103-disk-0   834G   964G        0B    964G             0B         0B

Thank you
Nico

 

[Dunuin]

You need to extend your filesystem inside the VM to make use of the additional space. Try a resize2fs /dev/sdb inside your VM after creating backups.

 

[nicoska]

You need to extend your filesystem inside the VM to make use of the additional space. Try a resize2fs /dev/sdb inside your VM after creating backups.

Thank you, resize2fs worked like a charm.

Anyway, isn't strange that it was not automatically detected by the VM? This is what I read on the official support page:
(https://pve.proxmox.com/wiki/Resize_disks)

"for virtio-iscsi disk:

Linux should see the new size online without reboot with kernel >= 3.7"

 

[dignus]

Linux sees it, hence the output in lsblk. Filesystem is another animal.

 

[LnxBil]

Linux sees it, hence the output in lsblk. Filesystem is another animal.

This is also OS independent. Windows also does not do this automatically.