External hard disk drive randomly ejects; stays on
My 250 GB I/O Magic USB external hard-drive randomly disconnects / ejects from the computer after between 2-30 minutes of use. When this happens, the blinking activity light on the front of the hard disk drive turns off; however, the disks can still be heard spinning. Unplugging and replugging in the USB does not reconnect the device and the activity light remains unlit. The only way to continue using it is to flip off and then on the power switch of the hard disk drive.