[DRBD-user] drdb and device-mapper problem

Simon Eisenmann simon at struktur.de
Thu Jul 16 10:45:39 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.


thanks to drbd #irc i was pointed to Ubuntu bug 246324, which is about
lvm.conf not copied into the initial ram disk.


Fixing this and regenerating the initrd makes drbd fly even on boot up. 

Best regards

Am Montag, den 13.07.2009, 15:55 +0200 schrieb Simon Eisenmann:
> Hi,
> i am trying to set up a drbd device on top of lvm following the howto on
> http://www.drbd.org/users-guide/s-nested-lvm.html. Everything works just
> fine and the device comes up without any problem.
> Though then i reboot the machine, the drbd device does not come up any
> more (ever again) failing with "Lower device is already claimed." 
> I am using the filter in lvm.conf as suggested in the howto and also did
> recreated the initrd to make sure it is using the same filter on boot.
> Though this problem still comes up.
> After some debugging i found out that the device manager has already
> loaded the lvm lv "replicated-foo" on boot (done by udev), which
> prevents drbd to get the disk.
> I am using "Ubuntu 9.04" with the default Ubuntu packages for drdb and
> lvm2. 
> Udev device mapper stuff happens in /lib/udev/rules.d/65-dmsetup.rules -
> i believe this file needs some sort of tweak to ignore signatures
> following a special name scheme (eg replicated-*) and not on a drbd
> device.
> Did anyone encounter this issue before?
> Best regards
> Simon
> _______________________________________________
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> drbd-user at lists.linbit.com
> http://lists.linbit.com/mailman/listinfo/drbd-user
Simon Eisenmann

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