[CentOS] DRBD Problem

[Johnny Hughes]

On Sat, 2006-06-24 at 07:02 +0100, centos at bathnetworks.com wrote:
> 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
> 
> 
> 

I am not an expert on filesystems ... but dm-0 and dm-1 look like raid 0
or LVM partitions as they have 253 as their Major device number.

What does fdisk -l say for that drive (/dev/hdd).





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