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Force an unmount of busy drives that won’t dismount

March 2nd, 2009 · No Comments

You are probably all too familiar with the situation – you are trying to unmount a drive, but keep getting told by your system that it’s busy. But what application is tying it up? A quick one-liner will tell you:

lsof +D /media/disk1

This will return the command and process ID of any tasks currently accessing the /media/disk1 directory. You can then locate them, or use the kill command to finish them off.

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