The 6TB SkyHawk Surveillance SATA III 3.5 Internal Hard Drive from Seagate is designed to withstand the stresses placed on it in a 24/7 surveillance system with 8+ drive bays. With support for up to 64 high-definition surveillance cameras this 6TB hard drive can hold a large amount of data and gives you the ability to upgrade and expand your security system. A SATA III 6 Gb/s interface sustained data transfer speeds of up to 180 MB/s and a 256MB cache all help to ensure uninterrupted data transfers. Furthermore the drive's 300 000 load/unload cycles 1 million hours MTBF and workload rating of 180TB per year and 14 non-recoverable read errors also help to ensure a long operational life.