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Subjectide/disk perf?
Could someone who knows ide and drive inside and out (Andre?) please
take a look at these figures? Am I forgetting to do something (or doing
something I'm not suposed to) to get the best numbers? I thought I'd be
able to get more than ~4MB/sec off the HPT366 and a UDMA66 drive.

Kernel: 2.4.0-test10-pre6

Onboard PIIX4 (Abit BE6-II):

[mhaque@viper mhaque]$ sudo hdparm -X34 -d1 -u1 -c3 -m16 /dev/hda

/dev/hda:
setting 32-bit I/O support flag to 3
setting multcount to 16
setting unmaskirq to 1 (on)
setting using_dma to 1 (on)
setting xfermode to 34 (multiword DMA mode2)
multcount = 16 (on)
I/O support = 3 (32-bit w/sync)
unmaskirq = 1 (on)
using_dma = 1 (on)

[mhaque@viper mhaque]$ dmesg|grep '^hda:'; sudo hdparm -Tt /dev/hda
hda: IBM-DJNA-371350, ATA DISK drive
hda: 26520480 sectors (13578 MB) w/1966KiB Cache, CHS=1650/255/63,
UDMA(33)

/dev/hda:
Timing buffer-cache reads: 128 MB in 1.12 seconds =114.29 MB/sec
Timing buffered disk reads: 64 MB in 4.94 seconds = 12.96 MB/sec

[mhaque@viper mhaque]$ sudo hdparm -i /dev/hda

/dev/hda:

Model=IBM-DJNA-371350, FwRev=J76OA30K, SerialNo=GM0GMFE4929
Config={ HardSect NotMFM HdSw>15uSec Fixed DTR>10Mbs }
RawCHS=16383/16/63, TrkSize=0, SectSize=0, ECCbytes=34
BuffType=3(DualPortCache), BuffSize=1966kB, MaxMultSect=16,
MultSect=16
DblWordIO=no, OldPIO=2, DMA=yes, OldDMA=2
CurCHS=16383/16/63, CurSects=-66060037, LBA=yes, LBAsects=26520480
tDMA={min:120,rec:120}, DMA modes: mword0 mword1 *mword2
IORDY=on/off, tPIO={min:240,w/IORDY:120}, PIO modes: mode3 mode4
UDMA modes: mode0 mode1 mode2 mode3 mode4



Onboard HPT366 (Abit BE6-II):

[mhaque@viper mhaque]$ sudo hdparm -X66 -d1 -u1 -c3 -m16 /dev/hde

/dev/hde:
setting 32-bit I/O support flag to 3
setting multcount to 16
setting unmaskirq to 1 (on)
setting using_dma to 1 (on)
setting xfermode to 66 (UltraDMA mode2)
multcount = 16 (on)
I/O support = 3 (32-bit w/sync)
unmaskirq = 1 (on)
using_dma = 1 (on)

[mhaque@viper mhaque]$ dmesg|grep '^hde:'; sudo hdparm -Tt /dev/hde
hde: Maxtor 53073U6, ATA DISK drive
hde: 60030432 sectors (30736 MB) w/2048KiB Cache, CHS=59554/16/63,
UDMA(66)

/dev/hde:
Timing buffer-cache reads: 128 MB in 1.24 seconds =103.23 MB/sec
Timing buffered disk reads: 64 MB in 16.18 seconds = 3.96 MB/sec

[mhaque@viper mhaque]$ sudo hdparm -i /dev/hde

/dev/hde:

Model=Maxtor 53073U6, FwRev=DA6207V0, SerialNo=K608NRYC
Config={ Fixed }
RawCHS=16383/16/63, TrkSize=0, SectSize=0, ECCbytes=57
BuffType=3(DualPortCache), BuffSize=2048kB, MaxMultSect=16,
MultSect=16
DblWordIO=no, OldPIO=2, DMA=yes, OldDMA=0
CurCHS=65535/1/63, CurSects=-4128706, LBA=yes, LBAsects=60030432
tDMA={min:120,rec:120}, DMA modes: mword0 mword1 mword2
IORDY=on/off, tPIO={min:120,w/IORDY:120}, PIO modes: mode3 mode4
UDMA modes: mode0 mode1 *mode2 mode3 mode4


--

=====================================================================
Mohammad A. Haque http://www.haque.net/
mhaque@haque.net

"Alcohol and calculus don't mix. Project Lead
Don't drink and derive." --Unknown http://wm.themes.org/
batmanppc@themes.org
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