[DRBD-user] LVM PV on drbd block device

Juan Antonio pushakk at limbo.ari.es
Fri Nov 13 20:37:21 CET 2009

Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.

Excuse me,

"so I could have been it before" -> "so I could have done it before"


> Hi Florian,
> I'm so sorry about my mistake, I'll promise to be more carefully in the
> future. Moreover I have already done the necesary tests so I could have
> been it before question the list. I'ts only that I am too "slowly? dumb?"
> reading and understanding the english language.
> Thank you very much.
>> On 11/13/2009 04:59 PM, Juan Antonio wrote:
>>> Hi again,
>>> Why the drbd documentation do not reference this issue in the
>>> "Configuring
>>> a DRBD resource as a Physical Volume" section?
>> Because googling for "DRBD LVM" and hitting the LVM page in the user's
>> guide does not mean you should be skipping the Fundamentals chapter. :)
>> From http://www.drbd.org/users-guide/s-resource-roles.html:
>> "A DRBD device in the secondary role receives all updates from the peer
>> node's device, but otherwise disallows access completely."
>> In other words, a pvscan on a Secondary device will never return a PV
>> signature for that device. For LVM's purposes, as long as that DRBD
>> resource is Secondary, no PV exists there. Make it Primary, rescan, and
>> as if by magic you'll see your PV sig, and your VG, and once you
>> activate it, all your PVs.
>> At this point I'll assume that you have different lvm.conf "filter"
>> entries on your nodes. Please go back and fix that, and follow the LVM
>> chapter again (after you've made sure you've understood the
>> fundamentals). In your current configuration you're probably signing up
>> for losing data.
>> Cheers,
>> Florian
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