lvm

extend disk

1. add new hard disk

2. take note of current /dev/sdx

3. scan for new devices: sudo /sbin/rescan-scsi-bus -w
Result: new device found

4. enter lvm as root: sudo lvm

5. create physical volume: pvcreate /dev/sdy

6. check volume groups: vgs

7. extend volume group: vgextend volume-name /dev/sdy

8. check logical volumes: lvs

9. resize logical volume: lvresize /dev/volume-name/root --extents +100%FREE

10. exit lvm: exit

11. resize to file system: sudo resize2fs /dev/volume-name/root