Date: Tue, 02 Mar 1999 18:01:54 -0800 From: grady@xcf.berkeley.edu (Steven Grady) To: "Kenneth D. Merry" <ken@plutotech.com> Cc: freebsd-multimedia@FreeBSD.ORG, freebsd-bugs@FreeBSD.ORG Subject: Re: CD-ROM problem on 3.0: Invalid argument? Message-ID: <19990303020132.520AA14D00@hub.freebsd.org> In-Reply-To: Your message of Mon, 1 Mar 1999 22:03:51 -0700 (MST) <199903020503.WAA76930@panzer.plutotech.com>
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Thanks for the information. I turned on CAM debugging, and when
I reproduced the problem, I found the following syslog data:
[At this point, it was successfully reading the disc.]
(pass2:ahc0:0:2:0): READ(10). CDB: 28 0 0 0 d bd 0 0 a 0
[Here I interrupted the read, and ran the program.]
(cd0:ahc0:0:2:0): PREVENT ALLOW MEDIUM REMOVAL. CDB: 1e 0 0 0 1 0
(cd0:ahc0:0:2:0): READ CD RECORDED CAPACITY. CDB: 25 0 0 0 0 0 0 0 0 0
(cd0:ahc0:0:2:0): PREVENT ALLOW MEDIUM REMOVAL. CDB: 1e 0 0 0 0 0
[Here, I ran the program again.]
(cd0:ahc0:0:2:0): READ CD RECORDED CAPACITY. CDB: 25 0 0 0 0 0 0 0 0 0
Each subsequent (failing) run of the cddb-id program generates the
same single "READ CD RECORDED CAPACITY" message.
By the way, I also tried to boot with -v, but I get a reproducible
page fault during boot. The information I saved is that the bell
turns on, and it enteres the debugger with the message:
Fatal trap 12; page fault in kernel mode
...
Stopped at _ansi_put+0x92: movw %ax,0(%ecx)
Since I've never debugged a kernel before, I gave up booting with -v
at this point.
I'm looking forward to the arrival of the 3.1 discs -- maybe they will
fix this problem. But meanwhile, perhaps this information can shed
some light on the bug.
Steven
grady@xcf.berkeley.edu
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