Date: Mon, 15 Jun 1998 11:30:01 -0700 (PDT) From: Stefan Eggers <seggers@semyam.dinoco.de> To: freebsd-bugs@FreeBSD.ORG Subject: Re: bin/5134: cdcontrol will eject a mounted CDROM Message-ID: <199806151830.LAA19392@freefall.freebsd.org>
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The following reply was made to PR bin/5134; it has been noted by GNATS.
From: Stefan Eggers <seggers@semyam.dinoco.de>
To: freebsd-gnats-submit@freebsd.org, obrien@NUXI.com
Cc: seggers@semyam.dinoco.de
Subject: Re: bin/5134: cdcontrol will eject a mounted CDROM
Date: Mon, 15 Jun 1998 20:17:46 +0200
Quote from the report:
Insert a CDROM into your SCSI cdrom drive.
mount_cd9660 /dev/cd0a /cdrom
/usr/sbin/cdcontrol eject
Insert a different CDROM into your cdrom drive
## OPPS! forgot to umount it first
umount /cdrom
BANG! reboot.
I did something similar. I had a CD mounted and at the same time xmcd
was running waiting for an audio CD.
The interesting part is that I have xmcd configured to unlock the tray
and it did this though the CD was mounted. I opened it by accident,
saw what I did and closed it again.
Before the drive recognized that I inserted a CD (my 12x SCSI CD drive
takes some time for this) I did an unmount on it and got a panic.
To get a useful message for the problem report I did it again but this
time I made sure that I had the console in front of me at the time of
the panic instead of the X11 screen. Thus I read:
panic: vref used where vget required
Maybe someone has an idea what went wrong or even how to prevent this
from happening.
Stefan.
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