WD Surveillance 1TB Hard Drive Specifications: Model: WD10PURZ (for the 1TB version, in the WD Purple series). Capacity: 1TB. Form Factor: 3.5-inch. Interface: SATA III (6 Gb/s). Cache: 64MB cache. Rotational Speed: 5400 RPM (standard for low-power operation). MTBF (Mean Time Between Failures): 1 million hours. Drive Performance: Designed for up to 64 HD
