[DRBD-user] LV becomes non-allocatable on other primary

himanshu padmanabhi himanshu.padmanabhi at gmail.com
Wed May 6 15:48:34 CEST 2009

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

Thank you all.
I upgraded to  'drbd-8.3.0',so now mirroring operation is fast.
and it is true that LVM on remote primary side cannot sense that it is

On Tue, May 5, 2009 at 10:55 PM, Matthew Wild <M.Wild at rl.ac.uk> wrote:

> George Negoita wrote:
> > Hello!
> >
> > On Tue, May 5, 2009 at 2:21 PM, himanshu padmanabhi
> > <himanshu.padmanabhi at gmail.com> wrote:
> >> I faced 2 problems on other primary side,
> >>
> >> 1. drbdlv1 has attributes as '-wi---' and not '-wi-a-'.I need to do
> >> 'lvchange' here to activate it.
> >>     Is there any way that  I can maintain their active state here?
> >>
> >> 2. PV,VG and LV are appears quite late,after 3-4 minutes.Why is this
> much
> >> delay,operation being synchronous?
> >
> > Because LVM is unaware of the changes you made on it's underlying
> > device (drbd physical volume). If you are using dual-primary mode, you
> > should use clvm, which is a lvm cluster extension.
> >
> > I don't know if this works!! If you don't want to use clvm, you can
> > try to bring down the second node, create the volumes on the first
> > node, then bring up the second node and run pvscan/vgscan/lvscan. This
> > should work as long as you don't make any other changes to the
> > volumes. Maybe someone can tell us if i'm wrong here.
> >
> I've just been playing with a 4TB drbd volume using a dual primary
> configuration, openais and clvmd on openSuSE 11.1. Things seem to be OK
> so far. It appears that openais may have some issues though :-(, due to
> it's youth, and the clvm stuff doesn't have a startup script, so will
> need to play around a bit.
> Of course you still can't use the two primaries without either a
> clustered file system or as I hope to do, failover for iscsi based Xen
> domUs on separate dom0 servers with multipath.
> Matthew
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Thanks and Regards,
Himanshu Padmanabhi
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