Seagate Terascale HDD v2 ST2000NM0055 2TB 3.5" 7200RPM 128MB Cache SATA3 6Gb/s Internal HDD Hard Disk Drive 1V4104-536.Model Number: ST2000NM0055Seagate Part Number: 1V4104-536Dell Part Number: TXT8N 0TXT8N TH-0TXT8NSpecifications:Form Factor: 3.5"Type: SATA HDDInterface: SATA III, Serial ATA-600 (6.0 Gb/s)Cache: 128 MBCapacity: 2 TBSpin Speed: 7200 RPM