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From: terry@cs.weber.edu (Terry Lambert)
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Subject: Re: Multidisc SCSI CD Rom Drives & More
To: bsd@jaguar.cris.com (BSD Mailing List)
Date: Fri, 11 Aug 95 12:12:44 MDT
Cc: freebsd-questions@freebsd.org
In-Reply-To: <199508111017.KAA01337@jaguar.cris.com> from "BSD Mailing List" at Aug 11, 95 10:17:15 am
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> Hi everyone!  I am a recent FreeBSD convert from Linux, and I'm very impressed
> with the product so far.  I have a few questions.
> 
> 1) FreeBSD detects the first disc in my Pioneer DRM-602X SCSI 6-disc
> cdrom drive, but doesn't check for more discs in the unit.  Does FreeBSD
> support the full capacity of this (and other multi-disc drives), and if so,
> how can I get it working properly?

Look in the file /usr/src/sys/i386/conf/LINT.  In it you will see a
device named "ch0".  You need to add one of these to your kernel.

> 2) Last night, I recompiled the kernel as documented in the FAQ, and 
> changed some of the default devices (ie. removed some I didn't need,
> adjusted the IRQs to my network card, etc).  When the kernel boots, I
> get the following panic message:
> 
> pmap_zero_page: CMAP BUSY
> kernel panic
> 
> This happens (it appears) as FreeBSD is displaying the devices on the
> system.

Diff your config file and /usr/src/sys/i386/conf/GENERIC.  Your old
kernel should still be there, so make sure you save it (boot /kernel.old
and copy it to /kernel.goo in case you have to build several kernels).

The diff should tell you what went wrong/what you left out.


					Terry Lambert
					terry@cs.weber.edu
---
Any opinions in this posting are my own and not those of my present
or previous employers.