Seagate Exos X20 20TB 3.5" 7200RPM SATA III 6 Gb/s Internal HDD

The Seagate ST20000NM007D is a hard drive in a 3.5 inch form factor that delivers 20TB of raw capacity for servers and dense storage arrays. It belongs to the Exos X20 family and provides a straightforward way to scale local or cloud infrastructure when more space is needed without redesigning the entire system.

Through a SATA III 6 Gb/s interface the drive sustains transfer speeds up to 285 MB/s. A rotation speed of 7200 rpm and a 256 MB cache keep large files moving smoothly whether you are streaming backups across the network, feeding virtual machines, or loading analytics datasets.

Inside, an enclosure that is sealed with helium lowers air friction so the platters spin with less power draw and minimal vibration. Seagate PowerBalance further optimises energy use, an advantage when hundreds of drives run around the clock in one rack. The drive supports both 512e and 4Kn sector formats, letting administrators match existing controllers without extra converters.

With a mean time between failures of 2.5 million hours and a limited warranty that lasts five years, the Exos X20 is ready for true 24/7 duty cycles. It suits data centre operators who need petabyte-scale cold storage, video surveillance archives that grow every day, and research teams capturing uncompressed sensor data. Wherever reliable high-capacity storage is required, this model slots in easily and keeps data flowing.

• 20TB capacity in a 3.5 inch form factor
• Up to 285 MB/s sustained data transfer through SATA III 6 Gb/s
• 7200 rpm rotation speed supported by a 256 MB cache
• Helium sealed enclosure with PowerBalance technology for lower power draw
• Mean time between failures of 2.5 million hours and a limited warranty that lasts five years
• Supports both 512e and 4Kn sector formats
• Engineered for continuous 24/7 operation in data-intensive environments