RE: large devices (3ware) - thanx for the info

With regards to your message at 03:16 PM 8/21/02, Rechenberg, Andrew. Where 
you stated:

Just as an FYI on the PCI bus, we found out from some testing that a
64-bit, 66MHz PCI bus can be the bottleneck while driving two LTO
Ultrium tape devices, so the PCI bus could definitely be a bottleneck
for fast hard disks (I don't know about ATA100/133 IDE, but with that
many disks, probably).

The next step up would be PCI-X which (I believe) is currently running
at 133MHz and provides burst transfer rates at up to 1GB/s
(GigaByte/sec) .

Regards,
Andy.

Problem is we are seeing WORSE figures on so-called fast PCI buses.
Both the Intel 7500 and Serverworks GC-LE actually give us WORSE figures on 
these same cards, which are 64 bit / 33MHz. Both boards have PCI-X slots, 
and we see no better in these slots.

And, from what I am seeing Intel 7500 has similar DMA issues in PCI as the 
old 860 chipset.



With our best regards,

Maurice W. Hilarius       Telephone: 01-780-456-9771
Hard Data Ltd.               FAX:       01-780-456-9772
11060 - 166 Avenue        mailto:maurice@harddata.com
Edmonton, AB, Canada      http://www.harddata.com/
    T5X 1Y3

2.3TB RAID5 NAS server - dual AthlonMP CPU, Linux, $10,995 CAD / $6850 USD