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Old 08-23-2004, 10:35 PM   #1
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umount: /mnt/floppy: device is busy

i am trying to unmount my floppy drive, and i get a busy error:

$ umount /dev/fd0
umount: /mnt/floppy: device is busy

i've tried to find out why it's busy, but i can't figure it out. i'm not accessing it.

any help? please.
Old 08-23-2004, 10:41 PM   #2
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are you in the floppy directory when you're trying to unmount it? (edit: ie., don't be. ) also, try running sync first, any data you transferred might still be cached in the buffer.

Last edited by synaptical; 08-23-2004 at 10:43 PM.
Old 08-23-2004, 10:45 PM   #3
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thanks. i'm not in the directory, but what is sync? Can i just erase the cache somehow?
Old 08-23-2004, 10:50 PM   #4
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Use: umount -l /dev/fd0

The -l means -lazy. I'm not kidding. =) This will make the dev unmount at the moment it stops being busy. I think the umount command actually accesses some devices whilist trying to unmount them, making that impossible. Kinda funny, isn't it?
Old 08-23-2004, 10:52 PM   #5
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thanks. very much appreciated.
Old 04-16-2010, 08:49 AM   #6
Registered: Jun 2004
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Originally Posted by bsolo34 View Post
i am trying to unmount my floppy drive, and i get a busy error
There is a way to unmount busy drives immediately. The solution is, obviously, to find out what is using the drive and stop that process.

For example:

fuser /media/cdrom <- Gives you the processes using the drive
fuser -k /media/cdrom <- Kills the processes using the drive

Taken from: Linux tricks: unmounting unresponsive drives


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