May contain traces of nut
For the record, I dont like these Seagate HDD, I had two of them fail in my Pc last year, with the same type of problems.
Also there is known firmware problems with these drives, mine is a ST31000424CS hdd.
My drive declares itself as ST3500312CS, which is also listed (anyone with custom firmware installed can check their drive model using WebIF >> Diagnostics >> Hard Disc [sic]).
I am not sure what to make of this, but note the Datarecovery web page (this is a data recovery company, not Seagate itself) says the defects are due to a faulty production process for drives manufactured up to January 2009.
Topic raised for further discussion.