I'm afraid I'm rather baffled by this problem with my 40GB USB hard drive.
Basically, Linux doesn't recognize it as a device at all, I can't mount it, fdisk it, fsck it, anything. It's as if it's not plugged in.
First I thought it must be a problem with the USB cable, so Iplugged it into my windows box to test it out with explore2fs, and it didn't find it. Good, I thought, until...windows found it as a device called "RC15" and started trying to find drivers for it.
So, this must mean that it can communicate with the computer, but there's a problem with the hard drive.
Any ideas? I don't really care about recovering the data from it, I've got backups, I just hope it isn't permanently damaged