USB Drive Constantly Disconnects/Reconnects

Try resetting NVRAM/PRAM http://support.apple.com/kb/ht1379

1. Shut down the computer.

2. Locate the following keys on the keyboard: Command, Option, P, and R. You will need to hold these keys down simultaneously in step 4.

3. Press and hold the Command-Option-P-R keys.

4. Turn on the computer.

5. Hold the keys down until the computer restarts and you hear the startup sound for the second time.

6. Release the keys.

The issue is likely that it is drawing too much power if it

is a bus powered drive or periodically makes power demands

that are more that the USB port on the Mini can provide. This

is kind of proven when using a USB hub.

Apple seems to strictly control USB powering much more than hubs

and more so than most PCs.

I have seen this scenario before and using a hub is the only solution

or using a drive with its own power supply.

Wanderglobe wrote:

Be nice if there was a switch to disable it though.

I find when macs constantly connect and disconnect hard drives they corrupt data.

Good suggestion to send up the chain of command—

Apple Feedback http://www.apple.com/feedback