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From: mmcg@heraclitus.cs.monash.edu.au (Mike McGaughey)
Newsgroups: comp.unix.bsd.freebsd.misc
Subject: Re: Diamond Data 16x CDrom?
Date: 25 Jun 1997 08:54:30 GMT
Organization: Monash Uni
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Last Tue, I wrote:
>
> I have a diamond data 16x IDE CDrom, which works fine under DOS.
> It is attached as a slave on wdc1 (I also have 3 IDE disks). When
> the CD is attached, FreeBSD fails to detect wdc1 (hence the third
> disk as well). However, FreeBSD works with the older (2x) Vertos
> 300SSD IDE CDrom which used to be in that box.
Well, that problem's solved: the wdc probe was failing because my
ATAPI drive doesn't initialise itself correctly (the drive
happily resets itself when probed later, by the ATAPI-specific
routines; the same thing happens under DOS). Then, the wdc probe
routine was correctly detecting that there was a controller, that
drive 0 was working, but that the second device (the CDrom) didn't
look right, and (due to an apparent logic error in a workaround
for some other broken hardware that I don't own and couldn't care
less about :), decided that having a non-working drive 1 implied
there was no controller.
The quick fix (has been send-pr'd) was to alter the workaround code
such that if drive 1 failed, we still assumed we had a controller
(which is reasonable, because the controller must have returned a
series of valid status codes to get to that point).
However, I'm still interested in:
> ps: anyone know where I can find the appropriate ATAPI and/or PC
> IDE controller specs?
After all, I have no idea what I'm doing here :)
Cheers,
Mike.
--
Mike McGaughey AARNET: mmcg@cs.monash.edu.au
"Thousands at his bidding speed,
And post o'er land and ocean without rest" - Milton.