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

["Thorsten Wolf" <T_Wolf@gmx.net>]

Dear Neil,
hi everyone else.

I've been reading a lot about the mdadm tools lately, and I believe that it is possible, but I haven't found the right documentation yet.

Is it possible to re-mount the RAID I have from another Linux installation? Do I need more than the 'mdadm --detail --scan > /etc/mdadm.conf' info saved to another location (so I can re-import it)?

Regards,

Thorsten

> 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

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