What happened to my external hard drive?

All of a sudden, it appears that my iMac is not recognizong my external hard drive used for Time Machine. When I open Time Machine, I get an error stating that it is not set up. It also shows that my last back-up was 08/04. There is no data in Time Machine. Did my drive die?

leoraponi wrote:
What I mean is that the PC recognizes the hardware. Not sure if thats a true test. In any event, I tried your suggestion and get the following: "resource busy".
In FINDER, under devices, it shows the Mac HD and iDisk. Shouldn't my external USB drive appear there as well?
Should I just buy a new external hard drive?
you might have to but it's not clear that your drive is dead. try reformatting it by booting from the leopard install DVD and using disk utility from there.

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