Re: LVM snapshotting broken?

Marcelo Tosatti
2000-10-26T23:07:59Z

On Fri, 27 Oct 2000, Andrea Arcangeli wrote:

> On Thu, Oct 26, 2000 at 06:34:48PM -0200, Rik van Riel wrote:
> > On Thu, 26 Oct 2000, Rik van Riel wrote:
> >
> > > it looks like the LVM snapshotting in 2.4 doesn't allow you
> > > to create snapshots from anything else than the _first_ LV
> > > in the VG...
> >
> > OK, I reproduced it in 2.2 as well ... ;(
>
> Which 2.2.x? LVM isn't supported in 2.2.18pre17 or any other previous version.
>
> For some irrelevant reason I always test snapshotting on a LV with minor
> number > 1 and the kernel side definitely works with 2.2.18pre17aa1:
>
> laser:/home/andrea # ls -l /dev/vg1/lv*
> brw-r----- 1 root root 58, 0 Oct 27 2000 /dev/vg1/lv0
> brw-r----- 1 root root 58, 1 Oct 27 2000 /dev/vg1/lv1
> laser:/home/andrea # lvcreate -s -n lv1-snap /dev/vg1/lv1 -L 400M
> lvcreate -- INFO: using default snapshot chunk size of 64 KB
> lvcreate -- doing automatic backup of "vg1"
> lvcreate -- logical volume "/dev/vg1/lv1-snap" successfully created
>
> laser:/home/andrea # lvremove -f /dev/vg1/lv1-snap
> lvremove -- doing automatic backup of volume group "vg1"
> lvremove -- logical volume "/dev/vg1/lv1-snap" successfully removed
>
> laser:/home/andrea #

With LVM from 2.2.18aa kernels (I dont exactly remember which one)