It seems it's the new trend amongst HD manufacturers.
* All ATA (and serial ATA..) disks are down to 1y warranty
* SCSI / FC disks are left to 3 to 5y
IBM opened the fire, and caught a nasty backfire from the user community. But now Seagate, Maxtor and others are following...
For more coverage, and specialized forums about these matters:
http://www.storagereview.com (i'm not affiliated in any way... it's just the best site around when talking about HDs)
Personally i couldnt care less, i've been all SCSI for a long time... And it will not change before another long time...