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Date: Tue, 22 Jan 2002 02:47:53 +0000
To: freebsd-questions@FreeBSD.ORG
From: Charlie Brewster <ecliptica.ww@virgin.net>
Subject: FreeBSD 4.4 - ATAPI-CDROM won't mount
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My FreeBSD box has a CDROM drive being recognised as /dev/acd0c

"dmesg" shows:
acd0: CDROM<ATAPI-CDROM> at ata0-slave using PIO4

"uname -a" gives:
FreeBSD 4.4-RELEASE Sun Jan 20 23:06:54 GMT 2002
root@/usr/obj/usr/src/sys/GENERIC i386

The machine is a P300 with 128 Mbytes RAM. 
FreeBSD is the only operating system.

With version 4.4 when I try to mount the CDROM as root immediately after
booting I get the following:
# mount /cdrom
cd9660: /dev/acd0c: Device busy
#umount /cdrom
umount: /cdrom: not currently mounted

I noticed this problem originally with FreeBSD 4.0, although it may only
have started after I installed the Linux emulator.

After upgrading by cvsup to 4.1 and I found the CDROM worked OK to start
with, but failed as above after I installed the Linux emulator.

With versions 4.2 and 4.3 the CDROM seemed to work OK although I didn't try
invoking the Linux emulator in either case.

With 4.4 it fails consistently and the Linux emulator has never been run
since the upgraded OS was installed.

I looked in the TODO files in the isofs source directory and tried 
"mount -t isofs -o -norrip /dev/acdoc /cdrom"
which might or might not have done the trick had "Rockridge Extensions"
been the problem, but that just gives:
mount: exec mount_isofs not found in /sbin /usr/sbin
No such file or directory.

Is anyone aware of any recent changes which might have been incorporated
into 4-STABLE or 4-CURRENT which might resolve this problem? Is there
anything I can run to diagnose it further?

Many thanks for any help.
Charles



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