External Hard Drives going to sleep.

Is there a way to set an external drive to NEVER sleep. I have several externals (Lacies and Seagates running USB2.0) and they go to sleep if not accessed regularly.
Which is a problem with a documentary timeline as if I'm in a viewing it freezes when I get to a part later on in the TL that has gone to sleep....for a viewing to go smoothly I have to export a QT, which quite frankly is a pain.
Any suggestions would be appreciated.
Cheers,
Susan.

To force your drives to never sleep:
Launch the Terminal application (Applications>Utilities>Terminal) and type:
sudo pmset spindown X
type your password when it asks for it.
X=the number of minutes that you want till your drive spins down.
0 (zero) is never
And note that this is a more 'controlled' way of checking "Put the hard disk to sleep when possible" than in system preferences/energy saver/sleep In there, checked means 10 minutes and unchecked means 180 minutes (not never).
More info on using pmset here:
http://developer.apple.com/documentation/Darwin/Reference/ManPages/man1/pmset.1. html
And this text was found here
http://www.thexlab.com/faqs/sbbod.html
x

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