[SunHELP] 2-disk mirroring

[Michael Karl]

Thanks David and Serg,

I've tested it ... it works fine.

Thanks very much.

Michael

> If you have ONLY two disks, you can include this line in your
> /etc/system file:
> set md:mirrored_root_flag=1
> 
> Refer to the Sun Blueprints online article on mirroring, etc.:
> Sun Blueprints articles:  http://www.sun.com/blueprints/browsesubject.html
> 
> Specific article: http://www.sun.com/blueprints/1002/817-0407-10.pdf
> 
> HTH.
> --
> David Strom
> 
> 
> Original message:
> 
> ------------------------------
> Message: 10
> Date: Fri, 15 Oct 2004 10:47:10 +0200
> From: Michael Karl <mk at lexcom-net.de>
> Subject: Re: [SunHELP] SDS/Sol8-9 question: replicas on a mirror ???
> To: <sunhelp at sunhelp.org>
> Message-ID: <BD955B2D.16423%mk at lexcom-net.de>
> Content-Type: text/plain; charset="US-ASCII"
> 
> 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
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>>> 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
>>> _______________________________________________
>>> SunHELP maillist  -  SunHELP at sunhelp.org
>>> http://www.sunhelp.org/mailman/listinfo/sunhelp
>>> _______________________________________________
>>> SunHELP maillist  -  SunHELP at sunhelp.org
>>> http://www.sunhelp.org/mailman/listinfo/sunhelp
> 
> ------------------------------
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