The coolest guy you know wrote:
> Clay Claiborne wrote:
> >
> > For what its worth, we recently built an 8 ide drive 280GB raid5 system.
> > Benchmarking with HDBENCH we got 35.7MB/sec read and 29.87MB/sec write. With
> > DBENCH and 1 client we got 44.5 MB/sec with 3 clients it dropped down to about
> > 43MB/sec.
> > The system is a 600Mhz P-3 on a ASUS P3C2000 with 256MB of ram, the raid drives
> > are 40GB Maxtor DMA66, 7200 RPM, and each is run as master on its own channel.
> >
> > Turning on DMA seems to be the key. Benchmarking the individual drives with
> > HDBENCH we got numbers like 2.57MB/sec read and 3.27MB/sec write with DMA off
> > and it jumped up to 24.7MB/sec read and 24.2MB/sec write with it on.
> >
> > That, and enough processing power to see that paritity calc is not a
> > bottleneck.
> >
> > --
> >
> > Clay J. Claiborne, Jr., President
> >
> > Cosmos Engineering Company
> > 1550 South Dunsmuir Ave.
> > Los Angeles, CA 90019
> >
> > (323) 930-2540 (323) 930-1393 Fax
> >
> > http:www.CosmosEng.com
> >
> > Email: [EMAIL PROTECTED]
>
> You have some pretty impressive numbers there.
> What controllers did you use?
>
> Chris
> --
2 Masters from the ASUS P3C2000 CDU Board, 2 Masters on a CMD648 based PCI controller
and 4 Masters on a 3Wave 4 port RAID Controller. I don't use the 3Wave as a RAID
controller though, just as a very good 4 channel Ultra66 board. They also make an 8
channel board, and that's what I'm going to use next time. I can put two in a system
an mount 16 IDE drives for raid while saving the on board IDE's for the usual stuff.
Clay.
Cosmos Engineering Company
1550 South Dunsmuir Ave.
Los Angeles, CA 90019
(323) 930-2540 (323) 930-1393 Fax
http:www.CosmosEng.com
Email: [EMAIL PROTECTED]
