The Synology HAT5310-18T is a high-capacity, enterprise-grade 3.5-inch internal hard disk drive engineered for demanding 24/7 storage environments. With an 18TB capacity , it utilizes a SATA 6Gb/s interface and operates at a 7,200 rpm spindle speed , ensuring reliable and efficient data access. Equipped with a 512MB cache , the HAT5310-18T delivers sustained data transfer rates of up to 268MB/s , making it suitable for applications requiring high throughput. Designed for continuous operation, the drive boasts a Mean Time Between Failures (MTBF) of 2.5 million hours and supports a workload rate of up to 550TB per year , underscoring its durability and reliability in enterprise settings. The HAT5310-18T is compatible with various Synology RackStation models, including the RS1619xs+ , RS3621xs+ , and RS4021xs+ , offering seamless integration into existing storage infrastructures. Additionally, the drive is built to withstand a wide range of environmental conditions, with an operating temperature range from 5°C to 60°C and storage temperatures from -40°C to 70°C . Its robust construction ensures reliable performance even in challenging conditions, making it an ideal choice for enterprise applications requiring high-capacity, dependable storage solutions.