That's crap. SCSI drives will typically last at least 3 years, sometimes 5 or more, easily. Most of my SCSI drives have lasted at least 3 years. In contrast, most of my IDE/ATA drives lasted less than 3 years.
I just had an 80GB IDE drive fail after only about a year. Granted, it was a member of the IBM DeathStar family. Just replaced it with a brand new 160GB WD SE.
Oh yeah, and if you're looking at SCSI, I heartily recommend the Maxtor 10K III or IV series. They rule. And you get 5 year warranties, which is nothing to shake a stick at.
Well, unless you really gotta have that much space for all your porn or music.