Messages in this thread | | | Date | Thu, 8 May 2003 00:12:36 -0700 (PDT) | From | Dave Zarzycki <> | Subject | PCI-X/Ultra320/RAID tuning problem? |
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I have the following setup, which is performing below my expectations. I was wondering if any of the list subscribers could provide any tuning tips:
Red Hat Linux 9 Tyan Thunder i7501 Pro (S2721-533) motherboard 2GB RAM 8 Ultra320 Seagate 15k.3 drives, 4 on each Ultra320 channel no additional PCI/PCI-X devices installed
dmesg: http://zarzycki.org/~dave/dmesg
lspci -vvv: http://zarzycki.org/~dave/lspci-vv.out
These lines in the dmesg output seem troubling:
aic79xx: PCI4:2:1 MEM region 0x0 unavailable. Cannot memory map device. aic79xx: PCI4:2:0 MEM region 0x0 unavailable. Cannot memory map device.
I seem to be topping out at 200 to 255MB/s depending on the setup (messured with hdparm -t and dd), while each drive is capable of 72MB/s. Dual Ultra320 with PCI-X should do better than this, right? I'd estimate 500+ MB/s given this setup. Am I being unreasonable?
Thanks for any help.
davez
-- Dave Zarzycki http://zarzycki.org/~dave/
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