dual bay external hdd enclosure with just 1 hdd?

[bumboarder6]

I bought the external hard drive enclosure linked to below and I was wondering if in general, or in this case in particular, you could use just 1 hard drive with the dual bay enclosure. In other words, does a dual bay enclosure mean I need to put two hard drives inside of it?

http://www.newegg.com/Product/Product.aspx?Item=N82E16817716061

Thanks.

[ChrisXPPro]

Just guessing really but I'd think you could run one HDD OK.

More spec' on this unit here ... http://www.galaxymetalgear.com/products/3538_nas_wl.html