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#1 (**permalink**) 01-05-2008, 09:11 AM

Greetings,

I have a rackmount RS/6000 running 4.3.3 that I picked up support on
recently. It has 3 pairs of mirrored disks, and recently hdisk1 failed,
which is the mirror of hdisk0 in vgroot. I checked Google and the
examples of replacing a failed mirrored drive all showed the drive with
status of missing. For me, hdisk1 showed as status of removed. I was
able to unmirror vgroot, remove stale lv refs to hdisk1 reduce the vg
and delete hdisk1 with no problem. I now have a standalone system disk,
hdisk0. I pulled and replaced hdisk1 and ran cfgmgr to detect the new
drive. No new disks were detected. I have two spare 18gb disks, neither
were detected and lspv shows the same disks as always, 0, 2-5, and the
three raid arrays.

Do I possible have another problem in the scsi controller that might
have caused the status of the failed hdisk1 to show removed instead of
status missing? Anything else I could check that might point me in the
right direction?

Thanks in advance for any assistance.

hfs

#2 (**permalink**) 01-05-2008, 09:11 AM

hfs wrote:
> Greetings,
>
> I have a rackmount RS/6000 running 4.3.3 that I picked up support on
> recently. It has 3 pairs of mirrored disks, and recently hdisk1 failed,
> which is the mirror of hdisk0 in vgroot. I checked Google and the
> examples of replacing a failed mirrored drive all showed the drive with
> status of missing. For me, hdisk1 showed as status of removed. I was
> able to unmirror vgroot, remove stale lv refs to hdisk1 reduce the vg
> and delete hdisk1 with no problem. I now have a standalone system disk,
> hdisk0. I pulled and replaced hdisk1 and ran cfgmgr to detect the new
> drive. No new disks were detected. I have two spare 18gb disks, neither
> were detected and lspv shows the same disks as always, 0, 2-5, and the
> three raid arrays.
>
> Do I possible have another problem in the scsi controller that might
> have caused the status of the failed hdisk1 to show removed instead of
> status missing? Anything else I could check that might point me in the
> right direction?
>
> Thanks in advance for any assistance.
>
> hfs

try running diag on the scsi adapter if nothing else is using it..

if you have another spare slot, or other machine, put your 'bad' disk
in there and see if it works.

#3 (**permalink**) 01-05-2008, 09:11 AM

Is this a RAID card? I haven't worked with SCSI RAID, BUT....when using
SSA RAID.....
if you add new disks the RAID card will 'hide' the disks from the OS.
You have to go into the RAID manager and create the arrays. Then the OS
can see the RAID arrays.

SSA RAID has an option to change the use of a disk from 'array
candidate' to 'system disk'.

Miles

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