How to resize and shrink the sole root mount LVM physical volume?

sof

2/8/24, 11:25 AM

I've selected LVM default option and completed Ubuntu 22.04 installation, but failed to resize and shrink the sole root mount LVM physical volume afterwards.

Method 1:

# mount -t ext4
/dev/mapper/vgubuntu-root on /

# pvscan
PV /dev/sda2 VG vgubuntu lvm2 [SIZE]  
Total: 1 [SIZE]

# resize2fs -p /dev/vgubuntu/root [NEW_SIZE]
Online shrinking not supported.
(Note: NEW_SIZE is smaller yet big enough.)

# umount /dev/vgubuntu/root
target is busy.

# pvresize --setphysicalvolumesize [NEW_SIZE] /dev/sda2
cannot resize to [SMALL_NUM] extents as [NUM] are allocated.

Method 2: open Disks GUI, but Resize... option grayed out on /dev/vgubuntu/root.

Method 3: open GParted GUI, can't shrink /dev/sda2 despite Resize/Move option available.

Method 4: boot into recovery/maintenance mode, same as Method 1

So, how to resize and shrink it to make a second physical partition?

159

0 + 0

partitioning

lvm

Elon Musk

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EN: How to resize and shrink the sole root mount LVM physical volume?

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