Re: Bug: remounting CD-ROM drives does not lock/unlock drive

From: Jens Axboe (
Date: Thu Aug 31 2000 - 08:49:02 EST

On Mon, Aug 28 2000, Rene Mayrhofer wrote:
> I already tried to do so, but I could not find a lock the CD-ROM
> tray on my (SCSI DVD) CD-ROM drive after it has been mounted with the door
> not being lock. How can this be done ?
> 'setcd -l1' does not work

I don't know setcd, but issuing a CDROM_LOCKDOOR ioctl with arg 1
will lock the door. Unmounting is a different issue, because currently
you can't do that if the drive is opened more than once (which it will
be, mount + locking program). I guess we could work around this by allowing
root to unlock a busy drive, or some other hack like that.

> 'echo 1 > /proc/sys/dev/cdrom/lock' doesn't either

This just controls whether tray is locked when it is opened, so it has
no effect after the mount.

* Jens Axboe <>
* SuSE Labs
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