whenever I put the details of my new 7200.11 500gb hdd purchased on Thursday at Warranty Validation I get:
**Expiration Unknown
Confirm Entry**
shall I return the hdd to the dealer & ask for another one?
before u do so , and go thru the entire hassel of removing ur stuff from the hdd and then reloading / reformating / repartitioning why don’t u take a screenshot of the error message u are getting and contact the :
“Warranty Support Contacts-Asia Pacific” on : https://seagate.custhelp.com/cgi-bin/seagate.cfg/php/enduser/stx_ask.php?p_cats=84
or u can call on 1-800-180-1104
9:00 A.M. to 6:00 P.M.
Monday - Saturday
That should sort out what exactly u need to do , u can attach the purchase invoice along too 
well i still have not installed it 
Edit: emailed Warranty Support right now too
Udit…sometimes it doesn’t work with the model no…enter the part no & serial no…it should work.
i was typing 90 instead of 9Q thus was not getting any info
now got Expiration 08-Mar-2013 
Wow… U are the one…
Mod. plz close this thread…
thnx for the link..
didn’t know about the warranty checker.