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Date:      Wed, 20 Dec 1995 18:48:32 +0000 (GMT)
From:      Martin Sapsed <m.sapsed@bangor.ac.uk>
To:        Peter Dufault <dufault@hda.com>
Cc:        Bruce Evans <bde@zeta.org.au>, m.sapsed@bangor.ac.uk, davidg@Root.COM, freebsd-bugs@FreeBSD.org, gibbs@freefall.freebsd.org, hm@hcs.de, j@uriah.heep.sax.de
Subject:   Re: Problem with FreeBSD 2.1.0-RELEASE
Message-ID:  <Pine.OSF.3.90.951220183638.22423K-100000@thunder>
In-Reply-To: <199512201148.GAA23036@hda.com>

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On Wed, 20 Dec 1995, Peter Dufault wrote:

> This seems to be the problem - I put the same check for >0 in cd.c
> in something pretty close to 2.1R and can access 7 CDROM file
> systems without any problem:

I've just had a look at this on my problem machine. At the moment 
/dev/cd0 isn't connected in but I've rearranged things so that the other 
17 drives are cd1 to cd17. I've put a CD into the first 10 and started to 
mount them and "du" the contents. Numbers 1 to 5 worked fine but when I 
du'ed /dev/cd6 I got: (cd6 is the 3rd drive on the 2nd bus if that helps)

fatal trap 12: page fault while in kernel mode
fault virtual address	= 0x6ed32c48		[0x2b478]
fault code		= supervisor read, page not present
instruction pointer	= 0x8:0xf01244dc
code segment		= base 0x0, limit 0xfffff, type 0x1b
			= DPL 0, pres 1, def32 1, gran 1
processor eflags	= interrupt enabled, resume, IOPL = 0
current process		= 203 (du)
interrupt mask		= bio
panic: page fault

I then reset and tried again and got the du off cd6 without the other 5 
mounted. Remounted the other 5 again, tried the du on 6 and bang - 
basically the same printout apart from the address in [ ].

Does this help at all? I was going to ask whether I just needed to bump 
up "DK_NDRIVE" but I guess that's a bit naive??

The drives are set to use 2048 byte sectors - is that any problem?

Martin

----------------------------------------------------------------------
Martin Sapsed                                Tel: +44 (0)1248 382409
Microcomputer Support Officer                Fax: +44 (0)1248 383826
UCNW Computing Lab                           
Bangor, N. Wales, LL57 2DG               "Who do you say I am?"
m.sapsed@bangor.ac.uk                              Jesus of Nazareth
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