On Sun, Jul 14, 2013 at 4:54 PM, Craig Sanders <cas@taz.net.au> wrote:

On Sun, Jul 14, 2013 at 12:15:59PM +1000, Jeremy Visser wrote:> My volume group is /dev/vg_glimfeather. I haven?t interacted with the

> raw PV, /dev/sda6, in over a year.

here's an example from the lvextend man page:

Extends the size of the logical volume "vg01/lvol10" by 54MiB on physi-
cal volume /dev/sdk3. This is only possible if /dev/sdk3 is a member of
volume group vg01 and there are enough free physical extents in it:

lvextend -L +54 /dev/vg01/lvol10 /dev/sdk3

If you look at the synopsis for the man page, you'll realise that the physical device is completely optional. It's for when you might have multiple PVs and wish to force this extend to happen on one in particular. For most use-cases you don't need to specify it at all.

and another from lvresize:

Extend a logical volume vg1/lv1 by 16MB using physical extents
/dev/sda:0-1 and /dev/sdb:0-1 for allocation of extents:

lvresize -L+16M vg1/lv1 /dev/sda:0-1 /dev/sdb:0-1

to extend or resize the volume, you've got to tell it which disk(s) to
allocate the free space from.

Nope. You can, but you don't have to.

/ Brett