PV-124T shoe shining on PE2950

[Stephen Carr]

I had this same kind of with a PV-132T on a PE1850 that turned out to be
a cable issue. Everything looked good (including the lights on the
terminator) but things would go dreadfully slow (I'd get about 2-4MB/s
instead of the 80-90 I expected). I noodled with the OS and the Adaptec
card for a long while before turning to Dell support for help. They knew
right away (it seemed) from what was happening that it was probably a
hardware issue (cable or terminator). They sent me new of both, we did
some testing and sure enough it was the cable. So, if you have a spare
cable and terminator around, try that out.

-----Original Message-----
From: linux-poweredge-bounces at dell.com
[mailto:linux-poweredge-bounces at dell.com] On Behalf Of Stephan Wonczak
Sent: Monday, March 05, 2007 9:13 AM
To: linux-poweredge at dell.com
Subject: Re: PV-124T shoe shining on PE2950

   Hi Christopher!

On Mon, 5 Mar 2007, Christopher McCrory wrote:

<snip>
> IIRC,
> U320 scsi can move 320Mbits/sec which is close to your 30MB/s

   Just to eliminate this misconception: U320 means 320MByte/s, not bit
- remember that SCSI is a parallel bus (well apart from SAS, of course
:-) ) and even the old, lowly SCSI-2 did 20 MByte/s :-) So YRW ('You
Recalled
Wrongly') to coin a new TLA.
   So to get back to the original poster's problem: Yes, 2 MB/s with
peaks of 30 MB/s are dreadfully low; something is wrong. No idea as to
what, though...

 	Dipl. Chem. Dr. Stephan Wonczak

         Zentrum fuer Angewandte Informatik (ZAIK)
         Regionales Rechenzentrum der Universitaet zu Koeln (RRZK)
         Universitaet zu Koeln, Robert-Koch-Strasse 10, 50931 Koeln
         Tel: ++49/(0)221/478-5577, Fax: ++49/(0)221/478-5590

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