ZFS

Backup any data before touching the drives! If it’s a VM, take a snapshot before doing anything! I can’t be responsible for any data loss - experiment on a throwaway VM first! Here I go through the steps to expand the data drive of my Nextcloud install from 500GB to 1TB. Confirm the drive size before any changes using lsblk, zfs list and zpool list root@nextcloud:/home/ncadmin# lsblk NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINTS sda 8:0 0 60G 0 disk ├─sda1 8:1 0 1G 0 part /boot/efi ├─sda2 8:2 0 2G 0 part /boot └─sda3 8:3 0 56.9G 0 part └─ubuntu--vg-ubuntu--lv 252:0 0 56.9G 0 lvm / sdb 8:16 0 500G 0 disk └─sdb1 8:17 0 500G 0 part root@nextcloud:/home/ncadmin# zfs list NAME USED AVAIL REFER MOUNTPOINT ncdata 321G 147G 321G /mnt/ncdata root@nextcloud:/home/ncadmin# zpool list NAME SIZE ALLOC FREE CKPOINT EXPANDSZ FRAG CAP DEDUP HEALTH ALTROOT ncdata 500G 321G 178G - - 9% 64% 1.00x ONLINE - You can also confirm it all matches in the mount point: ...