Re: SCSI problems with a 2650

On Fri, 25 Jul 2003, Andy De Petter wrote:

> 
> I'ld like to add this:
> 
> I have the problem only on 2650 running dual 2.0Ghz Xeon, and not on 
> 2650 running dual 2.4Ghz Xeon, while I have exactly the same Linux 
> flavor, with exactly the same drivers.

Possibly due to not high enough CPU usage and I/O to the disks.  We have
seen the problem on both 2650's and 1650's.  Currently I'm running a test
with write caching off.  It has been running now for about 10 days and I
have seen several command timeouts but to this point the
system has not completely cratered.

Regards
James Bourne

> 
> -Andy
> 
> Vincent Blondel wrote:
> > Stuart,
> > 
> > The real problem, I think , is not exactly and only
> > with Dell 2650 servers because I don't have one.
> > 
> > For remind my config is the following :
> > 
> > - motherboard TYAN s2468GN
> > - 2 x 512 PC2100/ddr226 Kingston memory module
> > - 2 x AMD Athlon MP 1800+
> > - Controller raid scsi ADAPTEC 5400s
> > - 4 x Hard Drive Cheetah 15k.3 18.4gb U320 Scsi-80
> > 3.6ms 15k Rpm 3.5lp ( RAID-5 )
> > - DVD ide PIONEER
> > 
> > so I would correct what you say with this :
> > 
> > 1.  This is a common problem being experienced by
> >     a lot of users running Linux, and 
> > SMP (Intel/AMD) machines with a RAID SCSI Controller (
> > with chipset equivalent to this one on Adaptec 5400s -
> > so module aacraid )
> > 2.  No one knows what the cause is ...
> > 3.  No one has any idea how to solve it either.
> >     ( This is not exactly true. ) I received an answer
> > from alan saying this : 
> > 
> > "As far as I can tell everyone in adaptec who knew
> > anything about this hardware and Linux was
> > 'downsized'"
> > 
> > So our problem could well be resolved if Adaptec
> > suports correctly their products. I found this
> > behaviour very dramatic for a so well known company
> > with so expensive and high level products.
> > 
> > So as I said it in this list, I will try this weekend
> > ( if I have time , not guaranteed !!! ) to install
> > FreeBSD and to analyze how this OS behaves with my
> > machine.  I know well this is not a linux solution but
> > if it really not work with it, what can we do ???
> > 
> > Furthermore, I searched a general e-mail for Adaptec
> > company to ask their opinion about this mail but I
> > didn't find one.
> > 
> > So, maybe one day Adaptec will really supports linux
> > ...
> > let's talk about this ...
> > vincent.
> > 
> > --- Russell Stuart <[email protected]> wrote:
> > 
> >>On Tue, 2003-07-22 at 16:21, Russell Stuart wrote:
> >>
> >>>This is a long post because it represents 6 months
> >>
> >>worth of effort in
> >>
> >>>trying to solve the problem myself.  I have now
> >>
> >>decided its a hardware
> >>
> >>>problem.  What I am after is confirmation, or
> >>
> >>failing that suggestions
> >>
> >>>on what to do next.  Preferably this should come
> >>
> >>from someone with
> >>
> >>>"@dell.com" or "@redhat.com" in their email
> >>
> >>address for reasons that
> >>
> >>>will be obvious later.
> >>
> >>Well, that was met with deathly silence - from dell
> >>and redhat anyway. 
> >>Given what Vincent said, I take it the situation is:
> >>
> >>  1.  This is a common problem being experienced by
> >>a lot of 2650
> >>      users running Linux, and
> >>
> >>  2.  No one knows what the cause is, ergo
> >>
> >>  3.  No one has any idea how to solve it either.
> >>
> >>Is that an accurate summary?
> >>
> >>_______________________________________________
> >>Linux-aacraid-devel mailing list
> >>[email protected]
> >>
> > 
> > http://lists.us.dell.com/mailman/listinfo/linux-aacraid-devel
> > 
> >>Please read the FAQ at http://lists.us.dell.com/faq
> >>or search the list archives at
> > 
> > http://lists.us.dell.com/htdig/
> > 
> > 
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> 
> 

-- 
James Bourne, Supervisor Data Centre Operations
Mount Royal College, Calgary, AB, CA
www.mtroyal.ab.ca

"There are only 10 types of people in this world: those who
understand binary and those who don't."

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