Hi all,
I've been wrestling with a problem with drdb and centos. I have successfully created one drbd resource, but when I try the create a 2nd, I get an error on one of the nodes:
Lower device is already mounted. Command 'drbdsetup /dev/drbd1 disk /dev/hdd1 internal -1' terminated with exit code 20
The partition is not mounted from fstab etc and is newly created with parted after wiping this disk with dd.
On the node with the problem I see:
cat /proc/partitions major minor #blocks name
3 0 60034968 hda 3 1 514048 hda1 3 2 1534207 hda2 3 3 57986617 hda3 22 0 120060864 hdc 22 1 114688003 hdc1 22 64 117220824 hdd 22 65 114688003 hdd1 253 0 117219800 dm-0 253 1 114688003 dm-1 147 0 114556928 drbd0
On the other node the dm-0 and dm-1 do not occur. Being new to Linux, I am not sure where these come from. I have tried google, but nothing makes sense. This maybe a red herring, but dm-1 has the same number of blocks as hdd1 which I am trying to mount so I'm guessing that this is the cause of the problem.
As I have tried changing every thing I can except the mb/processor and reinstalling, I'm really stuck.
HELP Please.
Rob