The SAS and SATA interfaces traded blows but neither one was definitively better. The Constellation.2 was behind the Constellation ES.2 in performance but is physically smaller and has lower power consumption.

Offered in SAS and SATA interfaces; High capacities for their respective form factors; Long warranty period

Available Capacities: 250GB/500GB/1TB; Interfaces: SATA 6Gbps; SAS 6Gbps (500GB/1TB only; Spindle Speed: 7200RPM; Cache: 64MB; Seek Time; Average Read/Write (ms): 8.5/9.5; Average Latency (ms): 4.16; Interface Ports: Dual; Idle Power Consumption: 3.85W; Random Read Operating Power Consumption: 6.4W,...

Seagate's Constellation.2 is the first 2.5" enterprise level 1TB hard drive. With 7200RPM, 64MB Cache, and a 6 Gbps interface, it is designed for the highest level of performance.

Excellent performance; Balanced read and write; 2.5" form factor; 1TB capacity; 5 year warranty

15mm thick – will not fit into laptops

Seagate designs small and delivers big with the new Constellation.2 Series of drives that deliver up to 1TB of capacity in a 2.5" form factor.

I started by ordering 2 of these drives for an older Dell T410 server. Since then, I've expanded to 4 more to create a total of 6 TB mirrored drives. The drives see light use, and I've not seen any failures yet.

I bought 3 of these. After 14 months one died. Need I say more? For an "enterprise" hard drive, this is dismal.

Fast and reliable.

This a good product at reasonable rate and delivered very quickly

This is a good drive for servers

This is a fast hard drive, with built-in encryption (a nice plus) and enterprise-grade reliability and build; It should last a long time

This is an enterprise drive, meant for servers, SAN's, and NAS'; That means it is thick; About 2x thicker than my laptop's current HDD; So, regrettably, I will be sending this back; I am guessing it to be in the 19mm range for thickness.

excellent product very fast and still working .

I have ordered 18pcs, 7 of them didn't work straight from the box. If there were less than 5 starts I would have rated minus