HP SAS 581286-S21 600GB 10K SAS Hard DriveHigh Performance Storage for Demanding Applications The HP 581286 S21 SAS Hard Drive delivers high speed data access and reliable storage for enterprise environments. With a capacity of 600GB, a 10K RPM spindle speed, and a 6G SAS interface, this hard drive provides the performance and capacity needed for demanding applications. Specifications: Brand: HP Model: 581286 S21 Capacity: 600GB Interface: 6G SAS Spindle Speed: 10K RPM Form Factor: 2. 5 inch