While the fact that the Cheetah 15K.5 offers twice the capacity of existing 15K-RPM drives is certainly impressive, Seagate is quick to note that the drive's performance has also been improved over previous generations. For example, the company claims that this latest Cheetah can sustain transfer rates of 125MB/s. Error protection has apparently been improved by a factor of 10, as well.
The Cheetah 15K.5 is actually Seagate's second hard drive to use perpendicular recording. Its first, the Momentus 5400.3 mobile ATA drive, was announced earlier this year. At the time, Seagate expressed that it expects all its new hard drive products to use perpendicular recording by the end of 2006. With that in mind, one can only hope that Serial ATA desktop drives are next in line for the perpendicular treatment.