From owner-freebsd-hardware  Sun Apr 19 11:18:05 1998
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Subject: Re: best wdc0 flags ?
Date: Sun, 19 Apr 1998 11:19:31 -0700
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From: Parag Patel <parag@cgt.com>
To: "Tommy Hallgren" <md6tommy@mdstud.chalmers.se>, <hardware@FreeBSD.ORG>
cc: "Mark Mayo" <mark@vmunix.com>
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Just for fun, here's what I get on my 486DX-100 (with 32Mb RAM):

bash-2.00$ dd if=/dev/rwd0 of=/dev/null bs=1m count=20
20+0 records in
20+0 records out
20971520 bytes transferred in 2.248524 secs (9326794 bytes/sec)

bash-2.00$ dd if=/dev/rwd0 of=/dev/null bs=1m count=20
20+0 records in
20+0 records out
20971520 bytes transferred in 2.259819 secs (9280177 bytes/sec)

bash-2.00$ dd if=/dev/rwd0 of=/dev/null bs=1m count=20
20+0 records in
20+0 records out
20971520 bytes transferred in 2.248620 secs (9326396 bytes/sec)

'Course, I am cheating.  This is a Quantum UDMA Fireball (3Gb) running on 
a CMD 646U2 PCI-UIDE chip running on 3.0-CURRENT with my driver mods to 
support the new CMD chip:

Clipped from dmesg:

[...]
ide_pci0: <CMD PCI646U2 Ultra/33 IDE controller> rev 0x05 int a irq 11 on 
pci0.1
5.0
ide_pci0: adding drives to controller 0: 0 1 2 3
[...]
wdc0 at 0x6100-0x6107 flags 0xa0ffa0ff on isa
wdc0: unit 0 (wd0): <QUANTUM FIREBALL ST3.2A>, DMA, 32-bit, multi-block-16
wd0: 3079MB (6306048 sectors), 6256 cyls, 16 heads, 63 S/T, 512 B/S
[...]

And the rest of the system is most responsive when this test is running. 
:-)


    -- Parag Patel <parag@cgt.com>


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