lvextend to increase my logical volume from 1 physical drive to 3. This seemed to go fine:
$ sudo pvs PV VG Fmt Attr PSize PFree /dev/nbd1 dbvg lvm2 a-- 139.70g 0 /dev/nbd2 dbvg lvm2 a-- 139.70g 0 /dev/nbd3 dbvg lvm2 a-- 139.70g 0 $ sudo vgs VG #PV #LV #SN Attr VSize VFree dbvg 3 1 0 wz--n- 419.09g 0 $ sudo lvs LV VG Attr LSize dblv dbvg -wi-ao---- 419.09g
Until I actually mounted the device and tried
$ sudo mount /dev/dbvg/dblv /mnt/virtual $ df -h Filesystem Size Used Avail Use% Mounted on ... /dev/mapper/dbvg-dblv 138G 122G 15G 90% /mnt/virtual
It seems like the mount only uses one of the disks (or something is cached and hasn't been updated yet), but why? What can I do to fix this?