3TB Green drive lost partition -- I think

This drive was in an My Book Essential and died when I powered it up after running several times over the last two years and did not spin.

I removed the drive from the enclosure and hooked it up to my desktop. The drive spun up and correctly identified itself as a 3TB drive in BIOS and Windows.

Here’s the issue. Partition Magic 7.0 and Windows only show 746MB accessible and that partition works fine.

How do I get the entire drive back?

Hello,

you may try writing zeroes using WD DLG.

Data Lifeguard Diagnostic for Windows

Warning: This will delete all data stored on the drive.

Yes, I did but and it came up with ABORT during the 7hr test.