I'm not sure if this one is related. This is on an AMD K6-2 450
with MS-5187 board and VIA VT82C686A chipset...
# hdparm -tT /dev/hda /dev/hdc
/dev/hda:
Timing buffer-cache reads: 128 MB in 3.16 seconds = 40.51 MB/sec
Timing buffered disk reads: 64 MB in 11.84 seconds = 5.41 MB/sec
/dev/hdc:
Timing buffer-cache reads: 128 MB in 3.12 seconds = 41.03 MB/sec
Timing buffered disk reads: 64 MB in 5.17 seconds = 12.38 MB/sec
# dmesg | grep 'hd[a|c]: '
hda: ST320413A, ATA DISK drive
hdc: SAMSUNG SV0761D, ATA DISK drive
hda: 39102336 sectors (20020 MB) w/512KiB Cache, CHS=2434/255/63, UDMA(66)
hdc: 14948640 sectors (7654 MB) w/434KiB Cache, CHS=14830/16/63, UDMA(66)
hda: hda1 hda2 hda3 hda4 < hda5 hda6 hda7 hda8 >
hdc: [PTBL] [930/255/63] hdc1 hdc2 hdc3 hdc4 < hdc5 hdc6 >
On Thu, Mar 01, 2001 at 08:59:30PM +1300, Nicholas Lee wrote:
>
> I've got a new Athlon 900 with Abit KT7A motherboard and a 20Gb Seagate
> ST320414A 7200 ATA100 HDD.
>
> I've been trying to figure out why my hdparm -t rates where so low.
>
> Then I stumbled across this:
>
> At this point dnetc (www.distributed.net client running RC5) is going
> full hog.
>
> nic@thunder:~/dnetc$ ./dnetc -hide -nice 19
> nic@thunder:~/dnetc$ sudo nice -n '-19' hdparm -m16 -tT /dev/hda
>
> /dev/hda:
> setting multcount to 16
> multcount = 16 (on)
> Timing buffer-cache reads: 128 MB in 0.92 seconds =139.13 MB/sec
> Timing buffered disk reads: 64 MB in 2.06 seconds = 31.07 MB/sec
> nic@thunder:~/dnetc$ ./dnetc -shutdown
> dnetc: 1 distributed.net client was shutdown. 0 failures.
> nic@thunder:~/dnetc$ sudo nice -n '-19' hdparm -m16 -tT /dev/hda
>
> /dev/hda:
> setting multcount to 16
> multcount = 16 (on)
> Timing buffer-cache reads: 128 MB in 0.90 seconds =142.22 MB/sec
> Timing buffered disk reads: 64 MB in 4.46 seconds = 14.35 MB/sec
>
> nic@thunder:~/dnetc$ sudo hdparm /dev/hda
>
> /dev/hda:
> multcount = 16 (on)
> I/O support = 1 (32-bit)
> unmaskirq = 1 (on)
> using_dma = 1 (on)
> keepsettings = 0 (off)
> nowerr = 0 (off)
> readonly = 0 (off)
> readahead = 8 (on)
> geometry = 2434/255/63, sectors = 39102336, start = 0
>
> nic@thunder:~/dnetc$ dmesg | grep --regexp 'DMA\|hda\|ide'
> BIOS-provided physical RAM map:
> ide: Assuming 33MHz system bus speed for PIO modes; override with idebus=xx
> ide: Assuming 33MHz system bus speed for PIO modes; override with idebus=xx
> VP_IDE: VIA vt82c686b (rev 40) IDE UDMA100 controller on pci00:07.1
> ide0: BM-DMA at 0xe000-0xe007, BIOS settings: hda:DMA, hdb:pio
> ide1: BM-DMA at 0xe008-0xe00f, BIOS settings: hdc:pio, hdd:pio
> hda: ST320414A, ATA DISK drive
> ide0 at 0x1f0-0x1f7,0x3f6 on irq 14
> hda: 39102336 sectors (20020 MB) w/2048KiB Cache, CHS=2434/255/63, UDMA(100)
> hda: hda1 hda2 hda3 hda4 < hda5 hda6 hda7 hda8 hda9 hda10 hda11 hda12 >
> 8K byte-wide RAM 5:3 Rx:Tx split, autoselect/Autonegotiate interface.
--
.--. Michael J. Maravillo office://+63.2.894.3592/
( () ) Q Linux Solutions, Inc. mobile://+63.917.897.0919/
`--\\ A Philippine Open Source Solutions Co. http://www.q-linux.com/
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