Below you find a description how to reduce a XFS partition. Important: This contains a full backup and restore of all data because XFS does not support shrinking.
Environment
- Arch Linux (Kernel 5.15.82-1-lts)
- XFS partition on LVM (vg_root/lv_home)
Workflow
- Boot Arch Linux from an USB drive
- Mount an USB disk for the backup data
mount /dev/sdc1 /mnt/usb - Store the UUID
blkid /dev/mapper/vg_root-lv_root > /mnt/usb/uuid - Install xfsdump
pacman -Sy xfsdump - Mount the LV
mkdir /mnt/vg_root-lv_home
mount /dev/mapper/vg_root-lv_home /mnt/vg_root-lv_home - Make a backup
xfsdump -l 0 -f /mnt/usb/vg_root-lv_home.xfsdump /mnt/vg_root-lv_home - umount /mnt/vg_root-lv_home
- lvremove vg_root/lv_home
- lvcreate –size 380GB –name lv_home vg_root
- mkfs.xfs /dev/mappger/vg_root-lv_home
- mount /dev/mapper/vg_root-lv_home /mnt/vg_root-lv_home
- xfsrestore -f /mnt/usb/vg_root-lv_home.xfsdump /mnt/vg_root-lv_home
- xfs_admin -U <UUID which you saved before into /mnt/usb/uuid> /mnt/vg_root-lv_home
- reboot
Done. Now you have shrinked your XFS partition.