As of this moment, here's what I see in Disk Management: 931.51 GB, Unallocated, with a dialog asking me to (again) initialize the disk. When I do so using MBR initialization, I get the following: 931.51 GB, RAW, (healthy) (Primary). A quick format fails with the error message, "The format did not complete successfully." I decided to download WD's Data Lifeguard diagnostic program. Running it, the drive passes the SMART check, Quick Test and Extended Tests. However, when I run the Write Zeros applet, it fails with the error message "Write Zeros Error," each time referencing a different sector on the hard drive. I am at a total loss, as I've installed many a hard drive over the years and have never seen this before.