The Western Digital VelociRaptor 150 GB desktop internal hard drive is designed for a power-packed performance. This internal hard drive delivers durable service and boasts a high MTBF and a tough 3.5 HDD form factor. The Western Digital VelcoiRaptor 150 GB has Serial-ATA interface for faster and effective operations. A fast rotating motor with speed of 10,000 RPM helps this SATA hard drive in quicker computing. The Western Digital VelociRaptor 150 GB has Average Latency and Seek Time of 3ms and 4.5ms (respectively) for prompt data location. This SATA hard drive has a fast external transfer rate for quick transfer and 16MB buffer for fast access to frequently utilized data.