Caviar Black problem!

WD Internal Drives Desktop & Mobile Drives
2

Someone else with more knowledge can help more perhaps, but have you checked if the drive has Advanced Format (4k blocks)?

There’s a ‘WD Align’ utility to align the partitions for 4k blocks I think.

See this page:

http://www.tomshardware.com/reviews/wd-4k-sector,2554-3.html