Date: Fri, 28 Jul 2000 11:38:33 -0700
Reply-To: "William W. Viergever" <wwvierg@IBM.NET>
Sender: "SAS(r) Discussion" <SAS-L@LISTSERV.UGA.EDU>
From: "William W. Viergever" <wwvierg@IBM.NET>
Subject: Re: SAS slow on RAID 5 Array?
In-Reply-To: <8ls6mk$i9h$1@nnrp1.deja.com>
Content-Type: text/plain; charset="us-ascii"
No *real* answer, but RAID 5's writes are not much faster than non-RAID, so don't expect miracles if there is a lot of writing(s).
Also, you don't say what the workstation vs. server has in terms of CPU or dasd type and config.
I've got a RAID 0 tower that was hung of my dual PII-400, 256MB RAM, NT 4.0 workstation box, that haa 7200 rpm LVD (Ultra2) drives (80mbs) and it seemed very cool compared to the stand alone 10K rpm Cheetah ultrawides (40mbs) that were in there originally.
I've now a newer W2K box, single PIII-800, 1GB RAM, with some 7200 rpm U160's. I've also hung the RAID tower off this newer box.
The new U160's smoke the RAID 0 drives - on this new box.
... and they're the 36 gig-ers as well <g>
Just some thoughts .. later
At 02:52 PM 07/28/2000, mrchurchill@MY-DEJA.COM wrote:
>Help! We were running SAS on an NT 4 workstation. Now we bought a
>dedicated SAS workstation (an HP LC 2000 server, Hp netraid 1si
>controller, nt 4 server with sp6a). Our objective was to run SAS jobs
>faster. We put in six 18gig hot swap drives and configured it for Raid
>5 (hardware). However, after running the first job, it did it in more
>time rather than less. It took the nt workstation 1 hour and this new
>NT server with raid 5, 2hours to process the job. Anyone know why? Is
>it because the new server has a raid 5 configuration? Any insight
>would be greatly appreciated.
>
>marka@hammacher.com
>
>
>Sent via Deja.com http://www.deja.com/
>Before you buy.
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