Become a MacRumors Supporter for $50/year with no ads, ability to filter front page stories, and private forums.

arsenalgear

macrumors regular
Original poster
Dec 17, 2007
100
1
Hi There,

The partition on my external HD for my Time Machine backup kept disconnecting today and I received several prompts that my drive was improperly dismounted. My other partition did not have this problem. I tried repairing the partition with Disk Utility, but it could not repair the disk. After other troubleshooting attempts, I decided to reformat the drive. However, for the past three hours, it says "Unmounting disk" with a striped bar.

How long should it take to reformat a 1TB 7200 RPM SATA HD over FW 400? I did not select any Security Options.

How can you test for hardware failures on an external HD?

Thanks!
 
Register on MacRumors! This sidebar will go away, and you'll see fewer ads.