WD WD101PURP 10TB Purple Pro 3.5″ SATA3 Surveillance Hard Drive – Capacity: 10 TB – Form Factor: 3.5 Inch – Cache Size: 256 MB – Interface: SATA 6 Gb/s – Disk Speed: 7200RPM – Transfer Rate: Up to 265MB/s – MTBF: 2,000,000 – Load/unload cycles: 600,000 – Annualized workload rating: Up to 550 TB/yr – Non-recoverable read errors per bits read: <1 in 10 - WD101PURP - 5 Years Limited Warranty