lkml.org 
[lkml]   [2003]   [May]   [8]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectPCI-X/Ultra320/RAID tuning problem?
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/



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

\
 
 \ /
  Last update: 2005-03-22 13:35    [W:0.031 / U:0.644 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site