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On Fri, 20 Oct 2000, Andre Hedrick wrote:

> Michael,
> Whatever card you are using, in you are getting that low I need to know
> more info. That drive should cook at 30MB/sec.

Andre, he wrote "old triton 2 board (Intel 430HX)". Do you really mean
you can do 30MB/sec on that board (no UDMA at all, AFAIK)?

# hdparm -i /dev/hda


Model=IBM-DPTA-372050, FwRev=P76OA30A, SerialNo=JMYJMG52550
Config={ HardSect NotMFM HdSw>15uSec Fixed DTR>10Mbs }
RawCHS=16383/16/63, TrkSize=0, SectSize=0, ECCbytes=34
BuffType=3(DualPortCache), BuffSize=1961kB, MaxMultSect=16, MultSect=16
DblWordIO=no, maxPIO=2(fast), DMA=yes, maxDMA=2(fast)
CurCHS=16383/16/63, CurSects=-66060037, LBA=yes
LBA CHS=1023/256/63 Remapping, LBA=yes, LBAsects=40088160
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

# hdparm -tT /dev/hda

Timing buffer-cache reads: 128 MB in 4.95 seconds =25.86 MB/sec
Timing buffered disk reads: 64 MB in 8.46 seconds = 7.57 MB/sec

Kernel is a 2.2.16 RedHat-patched but not IDE-patched. I suppose I could get
more with your patches (but really? DMA seems to work, it's just a pre UDMA
chipset, AFAIK), but I doubt I could go over the 25.10 MB/sec thing.
It'a an *old* MB, with a *slow* CPU (133MHz).

# lspci
00:00.0 Host bridge: Intel Corporation 430FX - 82437FX TSC [Triton I] (rev 02)
00:07.0 ISA bridge: Intel Corporation 82371FB PIIX ISA [Triton I] (rev 02)
00:07.1 IDE interface: Intel Corporation 82371FB PIIX IDE [Triton I] (rev 02)

(OK, mine is a 430FX, even older than Michael's one. The chipset is buggy,
I think, since doesn't let you go DMA on the second IDE channel. But a
430HX should be close in performance).

The DPTA-372050 does 20MB/sec on an Athlon MB, BTW. A DTLA-307030 does
35.5MB/sec on AMD-751/6-based boards (UDMA/66). But you know that... B-)

____/ ____/ /
/ / / Marco Colombo
___/ ___ / / Technical Manager
/ / / ESI s.r.l.
_____/ _____/ _/

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