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

Zdenek Kabelac zkabelac at redhat.com
Wed Jun 11 09:33:22 UTC 2014

Dne 11.6.2014 10:43, alessandro macuz napsal(a):
> 2014-06-11 9:53 GMT+02:00 Oliver Rath <rath at mglug.de <mailto:rath at mglug.de>>:
>     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
>     Regards
>     Oliver
> Hi Oliver,
> I see and back your point since the flexibility given by LVM can be obtained
> with ZFS as well.
> In this case I'm not trying to achieve anything but rather dealing with
> something already existing and without making too many changes I'd like to
> access that volume. I think my reasoning is correct but somehow I see
> something non-expected. I thought I could use pvs, and lvs later on, on any
> block device as for any physical disks.
> Maybe pvs is coded to work only with some devices on purpose, I haven't looked
> at the source. I don't think what I'm doing is wrong in theory and I would
> like to know if instead, from the theoretically point of view, it is.
> Thanks, Alex

Support for  ZFS partitions has been embedded into 2.02.106 lvm2 version.
You may as well add it to older version of lvm2 by updating your lvm.conf


You can add the following to your /etc/lvm.conf devices section to solve the 

types = [ "zvol", 16 ]


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