Auto-Disconnecting Drives on iMac w/ Lion

I'm also having the issue of drives disconnecting. (similar post found here, but on MacMini: https://discussions.apple.com/thread/2643206?start=0&tstart=0)
It happened today (first time) with my ipad 1st gen when i was moving files to it. It has been happening with my WD drive serving as my Backup for quite a while now (not sure when it started, but I haven't been able to keep my drive connected for more than a few minutes at best. But I do have another WD drive that is connected just fine and has never disconnected.
I tried Keep Drive Spinning tonight, and shortly after I set it up to keep my Backup drive active, my drive crashed. I have also tried swapping USB and power cords with no success. Does anyone else have an idea of what's going on or how I may be able to get it to work sooner rather than later?

Agree about the WD drive probably being the problem. Unfortunately External WD drives tend to have a lot of problems with Macs. If you can I'd recommend exchanging it out for a higher quality drive. I'd recommend any of the following:
G-Tech G-DRIVE series
LaCie d2 Quadra series
OWC Mercury Elite Pro series
If these are out of your price range then navigate to www.macsales.com (OWC) and choose any of their external HD's you will find their quality and service to be very good. Also because they specialize in Macs you know what they sell works.

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