Regular RHES 5.2 update broke raid setup...

Bas Mevissen abuse at
Wed Nov 26 11:29:51 UTC 2008

Heinz Mauelshagen wrote:

>> I'll fix the
>> server tonight (CET) and report eventual issues here.
> Please do.

(a little off-topic here)

Well, the server is restored. Unfortunately, there was a second problem. 
The root partition is identified by a label. So /dev/sda3 and /dev/sdb3 
have the label "/". When the mirror raid is activated, the raid set 
partition /dev/mapper/ddf1_XXXp1 obviously gets that label.

Previously, when trying to mount "LABEL=/", only /dev/mapper/ddf1_XXp1 
was discovered and the "/" labels of /dev/sda1 and /dev/sdb1 were not.

But that behaviour has changed recently. Now the system found label "/" 
at /dev/sda1 and tried to mount /dev/sda1. This fails because /dev/sda1 
is already in a raid set. So the system didn't boot...

You might wonder what the use of this setup was. The reason is simple: 
when the raid or one of the disks would fail, it would always find a 
label "/" and at least boot and work properly until you have time to fix 
the raid set.

Does this change in behaviour ring a bell to someone? I guess it has 
something to do with the recent lvm2 update. But that needs further 

Anyway after "some" swearing in the middle of the night, everything is 
running fine again.


(oh, and I hate Supermicro's IPMI implementation. It keeps losing its 
connection over the internet)

More information about the Ataraid-list mailing list