Meaning when you plug it in to USB you see no system events either in /var/log/messages or by using the dmesg command?
The bottom line is if you see no events upon plugging that drive into the USB then the machine is not seeing it. This could be any of:
- The USB port is broken, try another port if you can
- The USB port is too old for the technology type plugged in (very unlikely)
- The hardware is flawed, but if it's seen by other systems, then it's not flawed, so try another system
- Probably some other possibilities, but basically if you plug in a USB device it should at least be "seen" by the computer and by "seeing" I mean that the system log should note that something was plugged in even if it doesn't have a driver which works for it