Linux disk upgrade procedure - jandelgado/general GitHub Wiki

Once in a while I upgrade disks in my notebook. This is a description of the procedure for my personal reference.

I use encrypted disks and the logical volume manager (LVM).

Make a backup.
Preparation: copy old disk to new disk (using dd command). Since the source disk must not be in used while copying, this is easiest achieved by booting a rescue system from an USB drive or attach the disk to a second computer.
Resize partition: Use e.g. fdisk and delete the partition to be resized and re-create the new partition on the same starting sector, but with more sectors. Alternatively, use a different partitioning tool.
Open the encrypted block device with cryptsetup open /dev/<resized-partition> mydisk
Check with pvscan, vgscan, lvscan that LVM objects are found
resize physical volume with pvresize
resize volume group with vgextend -l+100%FREE ...
resize logical volume with lvextend -l+100%FREE <LV-Path>
Run e2fsck -f <LV-Path> on resized LV
resize filesystem with resize2fs <LV-Path>
mount new disk and check that filesystem grew in size.