Mysterious Hard drive errors

I have two hard drives that are both giving me mysterious errors.
A brand new Seagate ST3500320AS(C: ) and a 3 month old ST3500630AS(partitioned into 2 parts D: and E: ).I started getting random seemingly random crashes with no BSOd or anything, just a sudden restart. I checked my Event viewer and "there was a an error on \Device\Harddisk0\D during paging" at the time of the restarts. I ran Seatools inside of Windows the first drive's SMART failed almost immediately every time I ran a diagnostic test but the newer drive passed no problem. I then ran Seatools inside of DOS and got 0 errors. So I ran it in Windows yet again and got the same error. Seagate recomended running the long diagnostic test in DOS, I ran it error free. Upon going back into Seatools in Windows both my drives suddenly fail the SMART test but both pass all other tests.

Any ideas as to what could make two drives suddenly throw errors? Maybe SATA drivers?

ASUS M2N4-SLI
3 GB OCZ Platinum DDR2800
Athlon 64 X2 6000+
Seagate ST3500320AS
Seagate ST3500630AS