[DRBD-user] Lower device is already claimed

David Coulson david at davidcoulson.net
Thu Mar 18 17:06:53 CET 2010

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

Yes, you should not mount the lower block devices, only the /dev/drbd1 
device. Take any lower devices out of /etc/fstab.

On 3/18/10 12:04 PM, Cameron Smith wrote:
> I am experiencing the error:
> "# drbdadm up r0
> /dev/drbd1: Failure: (114) Lower device is already claimed. This 
> usually means it is mounted.
> Command 'drbdsetup /dev/drbd1 disk /dev/sda2 /dev/sda6 0 
> --set-defaults --create-device' terminated with exit code 10"
> DRBD was syncing between node1 and node2 and when I rebooted node1 I 
> got this from cat/proc/drbd:
> 1:r0   Connected  Secondary/Secondary  Diskless/UpToDate
> So I ran:
> drbdadm up r0
> and got the above error.
> Is the lower device the actual partition the drbd device is on which 
> is my case is /dev/sda2?
> Should that /dev/sda2 not be mounted at boot?
> What do I do to make DRBD happy on reboot?
> Thanks!
> Cameron
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> drbd-user at lists.linbit.com
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