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 - To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
