Seagate released a webpage dedicated to the current issues affecting some of its HD: http://seagate.custkb.com/seagate/crm/selfservice/search.jsp?DocId=207931&Hilite=
The list of potentially affected 3.5" HD:
Barracuda 7200.11
ST31000340AS ST31000640AS ST3750330AS ST3750630AS ST3640330AS ST3640630AS ST3500320AS ST3500620AS ST3500820AS ST31500341AS ST31000333AS ST3640323AS ST3640623AS ST3320613AS ST3320813AS ST3160813AS
Barracuda ES.2 SATA ST31000340NS ST3750330NS ST3500320NS ST3250310NS
DiamondMax 22 STM31000340AS STM31000640AS STM3750330AS STM3750630AS STM3500320AS STM350
