[linux-lvm] pvs -a on a partition of ZFS block device

Oliver Rath rath at mglug.de
Wed Jun 11 07:53:28 UTC 2014

Hi Alex,

Im not sure if I understand right: You take a zfv-Volume to create a lvm
volume inside? Make it sense to mix two similar concepts in this way?
Imho zfs and lvm are focussed to different goals, so if you combine it,
you get the worse of both.

What is your goal mixing these concepts? If you have created a
zfs-volume, you can mount it directly without detouring over lvm and
vice versa.

I think it is much better to decide for one of these (zfs-volumes XOR
lvm-Volumes) depending on your needs.

Just my 2ct


Am 10.06.2014 20:44, schrieb alessandro macuz:
> Hi all,
> the goal is to mount a LVM volume that is contained in a 8e partition
> of a zvol device.
> Since we speak about a production system I stated from the basic and I
> wanted to see if pvs would recognize the partition. No luck.
> root at server02:/mnt# pvs -a /dev/zd1168p2
>   Failed to read physical volume "/dev/zd1168p2"
> but on the other way on the same system I get 
> root at server02:/mnt# pvs -a /dev/sdb2
>   PV         VG         Fmt  Attr PSize   PFree
>   /dev/sdb2  vgserver01 lvm2 a-   464.83g 432.82g
> The only difference I can see between the 2 is the major number
> root at server02:/mnt# ls -la /dev/zd1168p2
> brw-rw---- 1 root disk 230, 1170 Jun 10 19:56 /dev/zd1168p2
> and 
> root at server02:/mnt# ls -la /dev/sdb2
> brw-rw---- 1 root disk 8, 18 Feb 11 10:43 /dev/sdb2
> Is it an expected behaviour that I pvs doesn't recognize "physical
> device" within ZFS block devices?
> Thanks, Alex
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