Seagate Exos X22 ST20000NM004E 20TB 7200RPM SATA 6Gb/s 256MB Cache CMR 3.5-Inch Enterprise Hard Drive (Certified Refurbished) - 5 Year WarrantyWhen building maximum density server and storage solutions with Seagate's 20TB Enterprise Capacity 3. 5 HDD (Helium), you can rest easy knowing that your storage infrastructure can scale to meet your growing capacity needs while offering consistent and predictable response rates. Enterprise Capacity 3. 5 HDD (Helium) supports enterprise class nearline workloads of 550TB yr and is backed by a 2. 5M hour MTBF and 5 year limited warranty, helping to meet