Mfr Part Number: WD1500ADFD Capacity: 150GB Speed: 10,000 RPM Interface: SATA 150MB/s Cache: 16 MB Max. External Transfer Rate: 150 Mbytes/sec Read Seek Time: 4.6 ms Write Seek Time: 5.2 ms (average) Supports Native Command Queuing (NCQ) RAID-specific, time-limited error recovery (TLER) 1.2 million hours MTBF