|Just wondering, your enclosure takes both 2.5" and 3.5 " hard drives? SATA AND IDE?|
Enclosure is a My Book WD USB type?
Do you have model numbers of the actual hard drives themselves, and NOT the enclosure?
Drive 1 Operating System was?
Drive 2 sounds like this may have been the original hard drive from the WD enclosure?
Just another stupid saying...