On Saturday 18 August 2001 06:14 pm, civileme wrote:
> On Saturday 18 August 2001 11:18, Terry C wrote:
> > I'm very puzzled, I have an Abit KT7A raid, VIA KT133A
> > chipset, IBM IC35L020AVER07-0 20GB ATA100 hard drive,
> > AMD T-bird 1.2 GHz. Using hdparm, (I realize it's
> > maybe not the best hard drive benchmarking tool, but
> > it is the one most people have available) and I get
> > the following results doing hdparm -tT /dev/hde
> >
> > /dev/hde:
> > Timing buffer-cache reads: 128 MB in 0.78 seconds
> > =164.10 MB/sec
> > Timing buffered disk reads: 64 MB in 1.73 seconds =
> > 36.99 MB/sec
> >
> > I may be misunderstanding what you are saying, but my
> > performance seems pretty good to me.
> >
> > TC
>
> basically you have an off-board controller for your IDE. The ide0 and
> ide1 channels if you look at dmesg, probably are operating in PIO4
> instead of DMA. The southbridge does not control ide channels 2 and
> up, usually.
>
> Civileme
>
Onboard controller, dmesg excerpts:
|
|
Applying VIA southbridge workaround.
|
|
VP_IDE: VIA vt82c686b (rev 40) IDE UDMA100 controller on pci00:07.1
ide0: BM-DMA at 0xd000-0xd007, BIOS settings: hda:DMA, hdb:DMA
ide1: BM-DMA at 0xd008-0xd00f, BIOS settings: hdc:DMA, hdd:DMA
hda: IBM-DPTA-371360, ATA DISK drive
hdb: IBM-DTLA-307030, ATA DISK drive
hdc: BCD-40XH CD-ROM, ATAPI CD/DVD-ROM drive
hdd: PLEXTOR CD-R PX-W8432T, ATAPI CD/DVD-ROM drive
ide0 at 0x1f0-0x1f7,0x3f6 on irq 14
ide1 at 0x170-0x177,0x376 on irq 15
[*Windoze] hda: 26712000 sectors (13677 MB) w/1961KiB Cache,
CHS=1662/255/63, UDMA(66) [*gets ~25mb/sec hdparm -t]
[*Mandrake] hdb: 60036480 sectors (30739 MB) w/1916KiB Cache,
CHS=3737/255/63, UDMA(100) [*gets ~36mb/sec hdparm -t]
hdc: ATAPI 24X CD-ROM drive, 256kB Cache, UDMA(33)
This has been the same dmesg for 8.0 with a 2.4.3, .5, or .7 kernel.
Currently on a 2.4.7-13mdk kernel, and the first time I've seen the
'Applying VIA southbridge workaround' statement. It seems to have no
affect.
--
Tom Brinkman Galveston Bay
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