Seagate Constellation.2 is the first enterprise-class SATA 2.5-inch hard drive that has a great capacity at 1TB. How is this possible is thanks to the technology to stuff two more platters to the default 2 platters per 2.5-inch HDD. Which mean in this Seagate Constellation.2, there are four 250GB platters stuffed together and make the 2.5-inch a little bit fatter at 15mm in thickness.
Seagate Constellation.2 is using the fastest SATA II 6Gbps interface or 6Gbps SAS interface to boost its performance, while still maintaining the best-in-class low power consumption record.
Aside from the 1TB version, you can also get Seagate Constellation.2 2.5-inch HDD in the size of 250GB and 500GB.