From owner-freebsd-hardware  Tue Apr  7 12:05:10 1998
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	Tue, 7 Apr 1998 12:03:43 -0700
Date: Tue, 7 Apr 1998 12:03:43 -0700 (PDT)
From: Bob Lash <bob@wbs.net>
To: "John S. Dyson" <toor@dyson.iquest.net>, technical@wbs.net,
        sos@FreeBSD.ORG, freebsd-hardware@FreeBSD.ORG, julian@ivision.co.uk
Subject: Re: 12.0 GB Quantum Bigfoot TX IDE seen as 8.4 GB
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Correction -- the dmesg file for this machine shows:

wdc0: unit 1 (wd1): <QUANTUM Bigfoot TX12.0AT>
wd1: 8063MB (16514064 sectors), 16383 cyls, 16 heads, 63 S/T, 512 B/S
wdc1 at 0x170-0x177 irq 15 on isa
wdc1: unit 0 (wd2): <QUANTUM Bigfoot TX12.0AT>
wd2: 8063MB (16514064 sectors), 16383 cyls, 16 heads, 63 S/T, 512 B/S
wdc1: unit 1 (wd3): <QUANTUM Bigfoot TX12.0AT>
wd3: 8063MB (16514064 sectors), 16383 cyls, 16 heads, 63 S/T, 512 B/S

(The other dmesg listing was for it's sister machine, which actully 
*does* have 8.4 Gig drives on it! Ooops...)

- Bob

On Tue, 7 Apr 1998, Bob Lash wrote:

> > > Yup, it appears we have a problem here, it seems as if we only support
> > > up to 2^14 cylinders. Does the probe line (dmesg) show the right
> > > cylinder count ??
> 
> No... dmesg shows the cylinder count capped off at 16383 (instead of 
> the 23,361 value found by BIOS). Here are the relevant dmesg messages:
> 
> wdc0: unit 1 (wd1): <QUANTUM FIREBALL SE8.4A>
> wd1: 8063MB (16514064 sectors), 16383 cyls, 16 heads, 63 S/T, 512 B/S
> wdc1 at 0x170-0x177 irq 15 on isa
> wdc1: unit 0 (wd2): <QUANTUM FIREBALL SE8.4A>
> wd2: 8063MB (16514064 sectors), 16383 cyls, 16 heads, 63 S/T, 512 B/S
> wdc1: unit 1 (wd3): <QUANTUM FIREBALL SE8.4A>
> wd3: 8063MB (16514064 sectors), 16383 cyls, 16 heads, 63 S/T, 512 B/S
> 
> > 
> > If Bob wants to fix it himself, we would also be willing to commit the
> > changes.
> > 
> > John
> > 
> 
> Thanks for the thought, John -- I wish I knew enough about the inner 
> workings of freeBSD to directly help with the code... :)
> 
> Best wishes,
> 
> Bob Lash
> bob@wbs.net
> 

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