Seagate Barracuda ES.2 250 GB SATA 32 MB Cache Bulk/OEM Hard Drive ST3250310NS The industry's highest-reliability 7200- RPM drive, designed for 24x7 operation Delivers 250 GB capacity, 32 MB Cache; SATA 3GB/s, 1.5 GB/s Seagate PowerTrim technology dynamically optimizes power consumption.