Problems with WD external drives

I'm not sure if this is a MacPro or System 10.5.2 issue or something else, but...

Got my new MacPro on Thursday. When I got it, I plugged in all my drives to figure out what gets daisy chained where until I get my PCI Sonnet Firewire card. All my drives worked great, no problems (1 Lacie, 1 G-Tech, 2 WD). I ejected the two WDs from the Finder window and unplugged them. Then proceeded to install and update all software (FCS, OSX 10.5.2, Photoshop CS2, etc). Aside from 10.5.2 everything I installed was in my old IMac.

Since then, I haven't been able to get either of my WD drives to work. One won't even power up. The one that does power up won't mount and looking at it using Disc Utility shows the drive as existing, but all options to repair/access it are greyed out.

I checked the WD website and there were a few MyBook updates for firmware, button manager, drive manager, none of which seem to have any effect.

Is anybody else having this problem?

Here's the newest (and weirdest) thing about this...neither work in any other computer either. Not on my IMac running leopard or my Powerbook running Tiger. When I try to fix the one My Book with DiscWarrior, it comes up but says it can't be fixed as it isn't a supported file system - it's coming up as MS/DOS-PC

I've tried connecting them via firewire and usb directly and daisy chained. And have swapped out cords left and right (ones that work with other drives have no effect)

it gets even stranger...while DiscWarrior wouldn't let fix it, checking it seemed to made it mountable again, so I can at least copy everything to another disc, then re-format it, and see if it works.

What I find odd is that both WD drives spazzed out at the exact time (and one hasn't recovered...my Time Machine, fortunately, since I can just copy everything from my old computer again)