mac partition failed could not unmount disk

The behavior is the same, regardless of how the drive is connected. Obviously, it's unlikely that I managed to procure two defective drives, so I'm thinking there may be something wrong with my machine.Īnother note - I've tried doing the format with the disk connected to both USB 2.0 ports on my machine, as well as connected through a USB hub. This is the second disk I've tried this with - I sent the first one back to Amazon thinking it was defective, and they sent me a replacement. If I try to create a new partition with the same filesystem, I get the following error: Partition failed with the error: The underlying task reported failure on exit

disenter-Fehler 49218 You’re now watching this thread and will receive emails when there’s activity. Please see our listing for full details and a description of any imperfections. When I click 'Erase', I get the following error after only a few seconds: Volume Erase Failed with the error: Please see our listing for full details and a description of any imperfections.Disk Utility > Run First Aid Once the process is done, you can access a detailed report.

I click the single partition on the disk, choose 'Mac OS Extended (Journaled)' for the Volume Format and leave the name as-is. I connect it to my white Macbook (purchased late 2007, 2.14 GHz with 2 GB Ram), open Disk Utility. I have an Iomega Prestige desktop hard drive (1 TB) which I purchased from Amazon.

Mac partition failed could not unmount disk