Cameron,
yes, I have tried to install SLES9 on a multipathed SCSI disk: it all wound
up in disaster.
There are no clear directions when one tries to achieve that using YaST
(there is md, LVM, and EVMS), not to mention scarce documentation.
I finally managed to create some multipathing configuration using md, that
didn't look too insane to me.
I clicked 'ok' when a YaST message appeared that warned me that my
multipath setup might not come up during IPL in some cases. Then the
installation crashed (oops in md?).
My personal conclusion is: no, multipathed boot devices are not supported.
Though it might be worth trying to setup a multipathed root device, using a
miniature (non-multipathed) boot device.
For the rest, I agree with Carsten.
Mit freundlichen Gr��en / with kind regards
Martin Peschke
IBM Deutschland Entwicklung GmbH
Linux for zSeries Development
Phone: +49-(0)7031-16-2349
Carsten Otte
To: Linux on 390 Port <[EMAIL
PROTECTED]>
02/11/2004 20:57 cc: Stefan Bader/Germany/[EMAIL
PROTECTED], Martin Peschke3/Germany/[EMAIL PROTECTED]
From: Carsten Otte/Germany/[EMAIL
PROTECTED]
Subject: Re: Best Practices EVMS FCP
Multipathing(Document link: Martin Peschke3)
Hi Cameron,
you definetly want to do multipathing with FCP. Unlike with FICON, your
adapter (and your physical fibre) will be a single point of failure if you
don't. In order to maximize performance, you can combine multipathing with
raid0 striping to gain further.
with kind regards
Carsten Otte
--
omnis enim res, quae dando non deficit, dum habetur et non datur, nondum
habetur, quomodo habenda est
"Seader, Cameron"
<[EMAIL PROTECTED] To: [EMAIL PROTECTED]
er.com> cc:
Sent by: Linux on Subject: Best Practices EVMS FCP
Multipathing
390 Port
<[EMAIL PROTECTED]
IST.EDU>
02/11/2004 01:40
AM
Please respond to
Linux on 390 Port
Greetings,
Just a few Questions reguarding FCP Multipathing. I have installed multiple
systems with a 5 GB LUN for the / system and am wondering if it is a good
idea to define this with multipathing, or is it better to add more disks to
the mix and multipath those that are only used for say databases and such?
What is the best practice for this. Is it a good idea to have multipathing
on your root volume or not? Novell does not seem to know either. They are
hinting at the idea a bit that there would be more problems if you had the
root volume setup with multipathing. Any ideas? What do you think? Has
anyone had any experiences with this that they would like to share?
-Cameron Seader
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