The WD1600SB-01RFA0 is a 3.5-inch IDE/PATA hard drive with 160GB capacity, 7200RPM spindle speed, and 8MB cache buffer. It features ATA-100 (PATA) connectivity, suitable for legacy enterprise and workstation systems requiring parallel ATA storage. Common applications include RAID arrays in older servers, storage expansion for aging infrastructure, and archival systems where PATA compatibility is required. The RE (Registered Enterprise) line targets 24/7 operation in server and NAS environments. Compatible with systems supporting standard 3.5-inch IDE/PATA form factors. This drive is tested and guaranteed, available via quote.