Hello John,

There is probably a bad connection between the hard disk and computer. I'm assuming that both your drives are external USB drives, is that correct? First thing to check is that the USB cable isn't loose. If that's not what it is, try swapping the USB cable from your other drive (assuming they are the same kind of cable) to see if it is a bad cable.

Another thing to do is re-seat the hard disk in the enclosure. To do this, open the enclosure (you'll likely need a very small screwdriver, or maybe not depending on your enclosure), then pull the disk from it's connection and push it back in firmly.

As well, try a different USB port... if you have a desktop PC, try using one of the ports on the back of the computer.

Since you have one working drive and one that's giving you trouble, it should be fairly easy for you to determine if is a problem with the cable, enclosure, or port. It is unlikely to be a problem with the hard disk itself in my experience.

Another possibility is that the drive isn't getting enough power. Does the drive have it's own power supply or is it powered by the USB port? If the latter, try one of the rear USB ports as mentioned above.

Andrew
PG Music Inc.