From: Alexei_Roudnev (Alexei_Roudnev_at_exigengroup.com)
Date: Fri Jan 19 2007 - 08:53:08 CET
Message-ID: <02cf01c73b9e$dc212620$6401a8c0@alexh> From: "Alexei_Roudnev" <Alexei_Roudnev@exigengroup.com> Date: Thu, 18 Jan 2007 23:53:08 -0800 Subject: Re: [suse-sles-e] Does multipath really works in SLES9 SP3?
I don't know:
- it was a lab system, so it is on partnernet support, not full 8x5 one;
- I used Emulex LP8000 HBA cards, they worked perfect in Windows (I used
them to debug and test Windows NetApp FC
multipath kit, with full success), but I am not sure, if they are 100%
supported in SLES9;
- I never find a way to report a bugs without opening full scale
trouble-ticket, and alweays had a problems opening such tickets thru the
partnernet.
I will try - at least, documentation is not correct.
I used SLES9 + LP8000 HBA with another SAN storage, but without multiipath,
in production for a long time, and did not experienced any problems.
When I tested mpio today (I really troubleshout NetAPP problem with Solaris,
so I used this SLES9 as a test system to verify,
how NetApp and switch works), I was surprised:
* mpio works, after adjusting configuration to the reality;
* when link1 failed, it switched over;
* but when I turn link1 back, and when MPIO daemon try to restore old
path, system freeze until I disconnect
this path.
I don't expect any problems with LP8000 card and driver, so I suspect mpio
software. Anyway, it is weird - this is canonical MPO combination - Emulex
card (no matter that it is older lp8000 - drivers are the same in general),
canonical MPIO (with the only one exception - I used 1 switch instead of 2,
with 2 separate zones), and canonical configuration (aside of the fact, that
YaST2 have mpio configuration which don't work at all).
> On 1/18/07, Alexei_Roudnev <Alexei_Roudnev@exigengroup.com> wrote:
> > - after all, first failure test with SLES9 SP3, build 2983 i386 smp,
with 2 Emulex LP8000 cards and NetApp
> > caused system freeze, when I tried to restore failed link.
> >
> > Does anyone ever use this multipath at all (succesfully)? I don't
believe, that it is usable in this shape. It is a very impoirtant component
of the SERVER
> > and it is a very critical one, so it must work perfectly (or it can't be
used at all).
>
> to me, this is worth opening an incident.
>
> Make support make it work "perfectly" for you, to prove that it will.
> And, then report the results back to us!
>
> :-)
>
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