How to disconnect a hard via commandline?

I have a portable USB drive that I am using for backups. I would like to schedule a auto disconnect of the drive so that when a user pulls the drive to take home the unit disconnects properly. The backup software does not seem to allow this.

Is there a way to do this via command line?

Thanks!
supportservicesAsked:
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ChiefoftheChissCommented:
Certainly

http://ask-leo.com/is_there_a_way_to_safely_remove_hardware_from_a_batch_file.html

or more simply
http://safelyremove.com/fullFeaturesList.htm
look down to the "Automating work with devices"
section
Good luck!
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ChiefoftheChissCommented:
Steves' answer looks pretty good too,
just in case you get lost in the thread he sent,
click this link (it's dog slow!) http://www.jsifaq.com/SF/Tips/Tip.aspx?id=8496
download the file referenced in the top of the text and follow the steps :)

Safelyremove.com might still be good if you have trouble with that.
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scrathcyboyCommented:
if those don't help, try task scheduler to run a command to disconnect the USB, which can be done through windows services -- but the utilities are probably easier than windows services.
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