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Date: Mon, 15 Sep 1997 19:55:20 -0600 (MDT)
From: Doug Russell <drussell@saturn-tech.com>
To: Jason Liao <jasonl@xinetron.com>
cc: freebsd-questions@FreeBSD.ORG, freebsd-hardware@FreeBSD.ORG
Subject: Re: Failed to install on WD WDC33100H HDD
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On Mon, 15 Sep 1997, Jason Liao wrote:

> I tried the HDD again on an old 486 computer.  It failed again.  There
> is no LBA, no 32-bit access, no block access, no PIO mode 4 support on
> the 486 computer.  The result is the same as on Pentium and Pentium
> PRO.  On a Pentium system, DOS 6.22 can fdisk it without any problem. I
> didn't try DOS on the 486.   I really believe that there are something
> special in the WDC33100H that the BIOS can support while FreeBSD 2.2.x
> can not.

<Doug grabs disk drive from pile on bench... :) >

In my hand I have a:

MDL:	WDAC33100-00H
P/N:	99-004217-000
CCC:	H9 4 MAR 97
DCM:	CLABKVH

Serial # is WT359 082 5920

If I plug it in to the machine beside me here, and pop in a 2.2.2-RELEASE
boot disk, change flags to 0x80ff80ff on both wdc entries...

wdc0 at 0x1f0-0x1f7 irq 14 on isa
wdc0: unit 0 (wd0) <WDC AC33100H>, 32-bit, multi-block-16
wd0: 3020MB (6185088 sectors), 6136 cyls, 16 heads, 63 S/T, 512 B/S
wdc1 at 0x170-0x177 irq 15 on isa
wdc1: unit 0 (wd2) <WDC AC33200L>, 32-bit, multi-block-16
wd2: 3098MB (6346368 sectors), 6296 cyls, 16 heads, 63 S/T, 512 B/S
 
It fdisks, disklabels, sysinstalls, no problem at all.

What geometry did fdisk report to you?
What did the probe report to you?
What were the settings in the BIOS?

Cylinders/Heads/Precompensation/LandingZone/Sectors/Mode
The default here for the 33100 is 767/128/0/6135/63/LBA
But, if I set it to 6136/16/65535/6135/63/NORMAL or
767/128/65535/6135/63/LARGE it works just fine as well.

Either something is going very wrong in the bios/probe/fdisk procedure, or
you have a flakey drive.  Why it works corectly under DOS I do not know.

Also, what motherboard and BIOS are you using?

Later......						<Doug>