WD Caviar EIDE hard drives are designed for mainstream desktop personal computers. They feature a fast 7200 RPM spindle speed, a 2 MB cache buffer, and up to 250 GB of storage. WD Caviar drives are built to the highest standards of quality and reliability by people who understand the importance of your data. Ideal For Mainstream computer users who want a high-value, entry-level hard drive. Users seeking higher performance should consider WD Caviar SE or WD Caviar SE16 hard drives. How this WD hard drive protects your data - Data Lifeguard™ is an exclusive set of data protection features, including shock protection, an environmental protection system and real-time embedded error detection and repair. WD's Data Lifeguard technology automatically finds, isolates, and repairs problems that may develop over the life of a hard drive. - Data Lifeguard Tools™ are software utilities designed for WD hard drives that work with the embedded Data Lifeguard features to make hard drive installation,diagnostics and repair both simple and worry-free. (Download Data Lifeguard Tools) - ShockGuard™ instantaneously protects the hard drive against damage from bumps and vibrations while it is running. This technology enables WD Caviar drives to achieve industry-leading shock specifications.