WD Caviar Green worst drives ever made by WD!
Can you let us know what type of issue you experience with the drive?
I have one as well, had it for 2 months and SeaTools is showing failed Short and Long DSTs. I know that's Seagate SW, but still. Can't boot from it at all, but can still access my data.
Did you look at the SMART values?
For boot drive you should have use WD Blue/Black 1TB