Re: SLES 9 SP3 and mdadm 2.6.1 (via rpm)

[Neil Brown <neilb@suse.de>]

On Tuesday June 12, T_Wolf@gmx.net wrote:
> Hello everyone.
> 
> I've got a SLES9 SP3 running and I've been quite happy with it so far.
> 
> Recently, I've created a 4 disk spanning RAID-5 on our company
> server. Runs quite nice and we're happy with that too. I created
> that RAID using the SLES mdadm (1.4 I believe) package. 
> 
> After discovering that there is a much newer mdadm out here (2.6.1),
> I decided to upgrade. It went just fine. Raid still running at 120
> MB/sec. 
> 
> After adding a disk to the raid, which went fine as well...... BUT:
> 
> The added disk /dev/sda1 shows up in /proc/mdstat, but does not have
> the "spare (s)" flag. 
> 
> Plus... the --grow doesn't work...
> 
> I get the: mdadm: /dev/md0: Cannot get array details from sysfs
> error which has been discussed before. Can it be that this is caused
> by the 2.6.5-7.2xx Kernel? Any ideas? 

Yes.  All of your issues are caused by using a 2.6.5 based kernel.
However even upgrading to SLES10 would not get you raid5-grow.  That
came a little later.  You would need to compile a mainline kernel or
wait for SLES11.

NeilBrown