Information: Storage capacity: This hard drive has a storage capacity of 400 GB (gigabyte). Interface: Use the SATA (Serial ATA) interface, which is common in server storage devices and high capacity storage systems. The SATA interface offers high data transfer speeds and easy connectivity to modern systems. Rotating speed: The WD4000YS has a rotation speed of 7,200 RPM (Per Minute rotations), offering high performance ideal for applications requiring frequent access to data and intensive I/O operations. Cache: This hard disk model includes a 16MB cache (megabyte) that acts as a fast memory to improve reading and writing performance of data. Format: It is designed for mounting in 3.5-inch housings, which is a common standard for high capacity server and storage systems. Reliability: The WD RE2 series hard drives are designed to deliver reliability and durability in high-intensity environments such as servers and business storage systems. RAID compatibility: This hard drive is designed to function effectively in RAID configurations, offering optimal reliability and performance in environments where redundant storage systems are required.