Seagate ST18000NT001 18TB IronWolf Pro 3.5' SATA NAS Hard Drive
NAS-optimised HDDs — offering performance, capacity, and high workload with CMR technology and AgileArray™ firmware.
Always on, always accessible, all-CMR portfolio engineered to deliver 24×7 performance, reliability, and dependability in multi-bay, multi-user commercial and enterprise RAID storage solutions.
Capacity: 18TB - Max. Sustained
Transfer Rate OD: 285MB/s
Interface: SATA 6Gb/s
Drive Design: Helium
Workload Rate Limit: 550 - Cache (MB): 256
RPM: 7200 
Sector Size: 512E
Drive Bays Supported: Unlimited
MTBF: 2.5 Million Hours
Recording Technology: CMR - ST18000NT001
Manufacturer Warranty: 5 Years Limited Warranty