[DRBD-user] drdb and device-mapper problem

Simon Eisenmann simon at struktur.de
Mon Jul 13 15:55:45 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.


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

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

Did anyone encounter this issue before?

Best regards

Simon Eisenmann

[ mailto:simon at struktur.de ]

[ struktur AG | Kronenstraße 22a | D-70173 Stuttgart ]
[ T. +49.711.896656.0 | F.+49.711.89665610 ]
[ http://www.struktur.de | mailto:info at struktur.de ]
-------------- next part --------------
A non-text attachment was scrubbed...
Name: smime.p7s
Type: application/x-pkcs7-signature
Size: 4277 bytes
Desc: not available
URL: <http://lists.linbit.com/pipermail/drbd-user/attachments/20090713/437d601f/attachment.bin>

More information about the drbd-user mailing list