Western Digital Raptor 80GB 10K RPM enterprise-class SATA hard drive (part no. WD800ADFS-75SLR2). Features 3.5-inch form factor with 3Gb/s SATA interface, 16MB cache, and 10,000 RPM spindle speed optimized for transactional workloads and I/O-intensive server environments. Rated for continuous duty in RAID arrays, NAS systems, and high-frequency database applications where sustained performance matters more than capacity. Compatible with standard 3.5-inch drive bays in rack servers, storage appliances, and tower systems. This legacy drive remains serviceable for maintained legacy systems or cold-storage rotation pools where 10K-class performance is required at reduced capacity. Tested and guaranteed; available via quote.