We have an Ubuntu 20.04 VM running under VMware. The users reported that the root partition is running out of free space. We first deleted some unused files, and it’s still not enough. The user decicded to increase the virtual disk size. After the increase of the virtual disk size, the OS does not recognize the increase automatically. Additional work is needed.
First problem I had is that I got this warning whenever I use the pvdisplay command:
WARNING: PV /dev/sda5 in VG ubuntuos is using an old PV header, modify the VG to update.
To fix this problem, I typed in this command to update the PV header:
vgck --updatemetadata ubuntuos
Let’s take a look of the physical volumes and logical volumes on my VM.
# pvdisplay -m --- Physical volume --- PV Name /dev/sda5 VG Name ubuntuos PV Size 49.52 GiB / not usable 2.00 MiB Allocatable yes (but full) PE Size 4.00 MiB Total PE 12677 Free PE 0 Allocated PE 12677 PV UUID bVLY9f-TeqI-MWL8-ClLq-s0jg-DKtx-ZjSNf1 --- Physical Segments --- Physical extent 0 to 12164: Logical volume /dev/ubuntuos/root Logical extents 0 to 12164 Physical extent 12165 to 12676: Logical volume /dev/ubuntuos/swap_1 Logical extents 0 to 511 --- Physical volume --- PV Name /dev/sdb VG Name ubuntuos PV Size 150.00 GiB / not usable 4.00 MiB Allocatable yes (but full) PE Size 4.00 MiB Total PE 38399 Free PE 0 Allocated PE 38399 PV UUID BiYKGF-dRxj-SjO1-RHhK-IcLk-fYUL-KmUMZF --- Physical Segments --- Physical extent 0 to 38398: Logical volume /dev/ubuntuos/root Logical extents 12165 to 50563
# lvdisplay -m --- Logical volume --- LV Path /dev/ubuntuos/root LV Name root VG Name ubuntuos LV UUID uzEY5B-BYzA-D2c5-1ajf-fpp6-2Vrb-uNrYyC LV Write Access read/write LV Creation host, time ubuntu16-generic-template-01, 2017-06-30 08:41:06 -0400 LV Status available # open 1 LV Size <197.52 GiB Current LE 50564 Segments 2 Allocation inherit Read ahead sectors auto - currently set to 256 Block device 253:0 --- Segments --- Logical extents 0 to 12164: Type linear Physical volume /dev/sda5 Physical extents 0 to 12164 Logical extents 12165 to 50563: Type linear Physical volume /dev/sdb Physical extents 0 to 38398 --- Logical volume --- LV Path /dev/ubuntuos/swap_1 LV Name swap_1 VG Name ubuntuos LV UUID bmOnUR-0jWp-P89p-uskY-wT4Q-yX2G-C56F2s LV Write Access read/write LV Creation host, time ubuntu16-generic-template-01, 2017-06-30 08:41:06 -0400 LV Status available # open 2 LV Size 2.00 GiB Current LE 512 Segments 1 Allocation inherit Read ahead sectors auto - currently set to 256 Block device 253:1 --- Segments --- Logical extents 0 to 511: Type linear Physical volume /dev/sda5 Physical extents 12165 to 12676
The logical volume /dev/ubuntuos/root has two segments: /dev/sda5 and /dev/sdb. /dev/sdb is the increased virtual disk. The size has been increased from 150 GB to 250 GB. However, the system does not recognize the increase. I typed in this command to resize the physical volume:
Now that the physical volume size is fixed, I can extend the logical volume by using this command:
lvextend -l +100%FREE /dev/ubuntuos/root
Finally, I can grow the file system to utilize the extra space. The file system is xfs, so I used this command:
xfs_growfs -d /dev/mapper/ubuntuos-root
If you have a ext4 file system, use the command
resize2fs to resize it.
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