Seagate Constellation ES ST31000424SS 1TB 3.5" 7.2K SAS 6.0GBps Hard Drive 9JX244.Seagate Model Number: ST31000424SSSeagate Part Number: 9JX244Specifications:- Form Factor 3.5" - Capacity 1TB- On-Board Cache 16MB- RPM 7.2K- Average Seek Time 8.5 ms- Drive Interface Type SAS 6.0 GBpsFeatures:- Low Halogen Design- Drive Self Test (DST)- Embedded Servo Design- PowerChoice Technology- Background Media Scan (BMS)- Idle Read After Write (IRAW)- Dedicated Head Load/Unload Zone- Perpendicular Recording Technology- Programmable Auto Write and Read Reallocation