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On my laptop the eject button for the CD/DVD drive is placed in a very unfortunate position and I hit it a dozen times per day and the tray pops out. I found many solutions which seemed to work for other people:

From man eject:

-i on | 1 | off | 0

This option controls locking of the hardware eject button. When enabled, the drive will not be ejected when the button is pressed. This is useful when you are carrying a laptop in a bag or case and don't want it to eject if the button is inadvertently pressed.

This seems to be exactly what I need. eject -i on successfully returns:

CD-Drive may NOT be ejected with device button

However, hitting the device button still ejects the drive. As suggested in another answer invoking

echo 1 > /proc/sys/dev/cdrom/lock

did not help either, lock already contains 1. The information from /proc/sys/dev/cdrom/info suggests that locking is possible:

drive name:            sr0
drive speed:           24
drive # of slots:      1
Can close tray:        1
Can open tray:         1
Can lock tray:         1
Can change speed:      1
Can select disk:       0
Can read multisession: 1
Can read MCN:          1
Reports media changed: 1

The cdctl tool is not in the Debian repository and it does not build on my system.

How do I lock my drive so that hitting the hardware switch on the drive would no pop out the drive?

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marked as duplicate by Marco, slm, Anthon, Karlson, peterph Feb 1 at 16:56

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

    
If you mount a CD-ROM, does it lock the drive? Can you see anything different in /proc/sys/dev/cdrom? –  Gilles Dec 28 '12 at 23:21
    
If a filesystem on the CD is mounted the locking with eject works. But not if it's not mounted or without media in drive. The contents of /proc/sys/dev/cdrom don't change. –  Marco Dec 29 '12 at 0:20
    
What is your OS? –  slm Jan 2 '13 at 0:30
    
@slm Debian GNU/Linux unstable with kernel 3.5.0 –  Marco Jan 2 '13 at 17:13
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1 Answer 1

I compiled cdctl some time ago for Fedora/CentOS. I've taken that compilation and converted to a .deb file. cdctl is the only application I've found that does a reliable job of locking/unlocking the CD/DVD eject button.

Feel free to give it a try.

Commands to lock and unlock

# locks the tray
% cdctl -o1

# unlocks the tray
% cdctl -o0
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With the patch I could compile it, but it does not work either. When I press the button the drive pops out. –  Marco Jan 2 '13 at 17:11
    
Something must of changed with the newer kernels, it worked up to 2.6.35.14-106.fc14.x86_64 for me on Fedora 14. I tried it on my Ubuntu 12.10 system and it disables the ability of the eject command from working but not the drives button on front. I'll take a peak at the cdctl source when I get a chance. –  slm Jan 2 '13 at 17:49
    
Curious, did you recompile on Debian? –  slm Jan 2 '13 at 17:50
    
Yes, see comment under my question. I did not test interference with eject. –  Marco Jan 2 '13 at 19:09
    
Not sure if you saw this Q&A, the issue with cdctl was resolved: unix.stackexchange.com/questions/104791/… –  slm Jan 31 at 20:21
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