[SOLVED!]Hard Drive no longer recognized.

[newyorkpaulie]

I use an Ultrabay hard drive holder (with a hard drive inserted) as an external storage drive. Now 2 of these drives are no longer recognized. I reformatted them in my primary drive slot and tried again by putting them into the Ultrabay holder and still cannot get my OS to "see" them. Anyone ever have this problem? Any tips? Thanks.
Maybe I removed them or shut down without unmounting? I don't know why it happened to the 2 and not the other ones I use this way.

Added this "edit" - 8-12-10:
I tested the Ultrabay hard drive holder itself and found that it was not working. Garbage!