Single Bulk Pack Western Digital XE SAS HD 300GB, 6 Gb/s, 3.5", 32 MB Cache, 10000 RPM - Protect your investment by upgrading to the latest Enterprise performance storage technology from WD. WD XE drives deliver 50% higher capacity, higher sequential performance, higher reliability and up to 67% lower power consumption versus 3.5-inch 15,000 RPM drives.