オリジナル投稿者： Dan ,
What type of connection are you working from FireWire or USB? Try a different cable. If the USB drive has two connections make sure both are connected. If you have a self powered (via the FW or USB connection) try connecting an external power supply. As disk drives age they often need a little more power. When running these externals on the older MacBook or MacBook Pro's the current limits of the USB ports can cause the drive to react like this.