dual enclosure preoblem - FW/USB

[metropical]

I've got this WD 120G Caviar 7200 rpm drive. I stick it in a FW/USB enclosure. I've tried setting the jumper for slave, master, neutral and single. I haven't tried cable, but it doesn't seem to make sense to try that.
Works fine in FW, especially in Neutral, very fast mount. But it won't mount via USB no matter what.
I've tried 3 "native" ports on the G5, all of which support other USB devices, though none are drives. Tried another A/B cable. No change.
ideas?

 

[ElDiabloConCaca]

I've got an idea -- tell us what brand and model the enclosure is, as well as the specific model of G5 you're using and the version of Mac OS X you're using!

What jumper setting does the enclosure recommend using?

 

[metropical]

hmmmmm, that is a good idea isn't it?
dual 2G, X.4.3
http://eshop.macsales.com/item/Other World Computing/MEFW91UAL1K/

they say master. I've found that it mounts fastest in what WD calls neutral.
If fast mount is any measure of anything. That's FW only. No joy with USB.
The closest I got was trying to mount it at the keyboard port (I knew it wouldn't but ....) Error said move device to a powered port or power the device.

 

[ElDiabloConCaca]

Hmm... when you plug it in via USB, does the device/enclosure show up in Disk Utility? Does the "Mount" command in Disk Utility do anything when it's connected via USB?