Effective December 31, 2011, Seagate will be changing its warranty policy from a 5 year to a 3 year warranty period for Nearline drives, 5 years to 1 year for certain Desktop and Notebook Bare Drives, 5 years to 3 years on Barracuda XT and Momentus XT, and from as much as 5 years to 2 years on Consumer Electronics.According to Seagate, the change to the company's warranty terms is made "to be more consistent with those commonly applied throughout the consumer electronics and technology industries. By aligning to current industry standards Seagate can continue to focus its investments on technology innovation and unique product features that drive value for our customers rather than holding long-term reserves for warranty returns".
The details of the new warranty periods are:Constellation 2 and ES.2 drives: 3 years Barracuda and Barracuda Green 3.5-inch drives: 1 year Barracuda XT: 3 years Momentus 2.5-inch (5400 and 7200rpm): 1 year Momentus XT: 3 years SV35 Series - Video Surveillance: 2 years Pipeline HD Mini, Pipeline HD: 2 years
Mission-critical and retail products are not affected by this change. The new warranty periods will apply to shipments from 31 December.
Personally, I believe it's more related to the HDD supply crisis.