[SunHELP] SDS/Sol8-9 question: replicas on a mirror???

[Michael Karl]

Hi,

I must explain this problem with an example.

A Sun with SDS and mirrored boot/system-disks - it was running for
3 or 4 years - had to be moved in a new serverroom. Shutting down
and so on ... no problem.

But at the new place this sun don't start normal, because one disk
of the two boot/system-disks had a failure.

It had started in single-user-mode and I had to remove the missing
replicas manually ...

I'm looking for a solution, that the sun will start without any
replica-problem/error, which must be solved for normal startup.

Thanks und regards 

Michael
> hello neighbour,
> 
> sorry, but especially for your question i have no answer - for not
> exactly understanding the case.
> 
> if a disk will die the mirror-disk instantly takes over.
> 
> how do you control your volumes? we use veritas-volume-manager giving
> the opportunity just change the broken disk and "remirror" again.
> 
> booting with a damaged disk we do that way:at the OK-Prompt i write
> instead of 
> 
> boot 
> 
> boot <diskname> 
> 
> so the machine uses the disk i prefer.
> 
> not sure if this info can help you ?
> 
> anyhow happy weekend, neighbour
> 
> 
> 
> 
> 
> Michael Eble
> ------------------------------
> 
> Systemadministration
> Informationstechnologie
> Klinikum der Stadt Ludwigshafen am Rhein gGmbH
> Bremserstr. 79
> D-67063 Ludwigshafen
> Germany
> 
> Phone +49-621-503-2227
> Fax      +49-621-503-2019
> mailto: michael.eble at klilu.de
> Homepage http://www.klilu.de/
> 
> 
> 
>>>> mk at lexcom-net.de Freitag, 15. Oktober 2004 10:47:10 >>>
> hi Michael,
> 
> thanks for the answer ... I agree. Sorry ... bad example in question
> ...
> I'd never made such a configuration ... everytime I'm using two
> controller
> ... also on my home-office UE10 with 2 IDE-Controllers.
> 
> But much more disks had died in the last years ... but only one or two
> controller in very many Suns ;-)
> 
> Ok ... I have two onboard-controller in a Sun like a E420R ... one disk
> on
> each controller ... mirrored ... but my first problem will happen, if
> one
> of these disks will die ... correct ?
> 
> If one disk will die the replicas will be missing from this dead disk
> ...
> Single-User-Mode, metadb -r ... etc.
> 
> Is there any workaround to this behavior ?
> 
> Thanks Michael
> 
> (To Michael: Michael from Waibstadt nearby Sinsheim ;-)
> 
> 
>> hi michael,
>> 
>> you will have a big problem, if none of the disk die but a
> controller.
>> 
>> try to mirror on another controller than c0.
>> 
>> regards
>> michael
>> 
>> Michael Eble
>> ------------------------------
>> 
>> Systemadministration
>> Informationstechnologie
>> Klinikum der Stadt Ludwigshafen am Rhein gGmbH
>> Bremserstr. 79
>> D-67063 Ludwigshafen
>> Germany
>> 
>> Phone +49-621-503-2227
>> Fax      +49-621-503-2019
>> mailto: michael.eble at klilu.de
>> Homepage http://www.klilu.de/
>> 
>> 
>> 
>>>>> mk at lexcom-net.de Freitag, 15. Oktober 2004 09:53:03 >>>
>> Hey,
>> 
>> I'm thinking I have a problem with mirroring the boot- and system-
>> partions.
>> 
>> Example:
>> mirror of root
>> mirror of swap
>> mirror of usr
>> 
>> replicas are on c0t0d0s3 and c0t1d0s3.
>> 
>> eeprom is correct to first and second boot-device.
>> 
>> If one of these disks would die and someone must reboot the system,
>> it's starting only in single-user-modus, because someone must delete
>> the missing replicas of the failed disk before.
>> 
>> Is there any workaround for normal startup ?
>> 
>> 
>> Regards Michael