Seagate Exos X24 ST12000NM001H 12TB 3.5-Inch SATA 6Gbps 7200RPM CMR Enterprise SED HDD, 512MB Cache, Helium-Sealed, 285MB/s, 2.5M-Hour MTBF 

Expert Features

• 12TB Enterprise-Class Capacity : Twelve terabytes of CMR storage gives dense RAID, enterprise backup, distributed file systems, content delivery, analytics, and large-scale archiving systems serious breathing room before the “storage full” notification starts emotionally blackmailing the IT department.
• Exact SED Security Model : ST12000NM001H is Seagate’s 12TB SATA Self-Encrypting Drive model, with data-at-rest security provisions based on Trusted Computing Group standards; compatible TCG host or controller support may be required.
• Proven CMR Recording : Conventional Magnetic Recording delivers conventional enterprise HDD recording behavior without disguising SMR underneath a fancy capacity sticker. Seagate explicitly lists CMR for this model family and capacity.
• Helium-Sealed Enterprise Design : The helium-sealed drive architecture is built for high-capacity storage density while Seagate’s Exos platform targets demanding cloud and enterprise environments.
• 7200RPM Performance : A 7200RPM spindle, 4.16ms average latency, and up to 285MB/s maximum sustained outer-diameter transfer rate give bulk storage workloads substantially more enterprise muscle than ordinary low-performance archive drives.
• Massive 512MB Cache : The multi-segmented 512MB cache helps the drive handle demanding storage activity while Native Command Queuing and advanced cache algorithms support enterprise workloads.
• 2.5 Million-Hour MTBF : Seagate rates the Exos configuration for 2,500,000 hours MTBF, a 0.35% AFR at full 24×7 operation, and 8,760 power-on hours per year. That is enterprise reliability language, not “I store Steam games and pray.”
• 550TB per Year Workload Rating : The Exos X24 SATA product manual specifies a maximum rated workload below 550TB per year, designed around serious always-on storage activity.
• PowerChoice and PowerBalance : PowerChoice idle-power technology and PowerBalance power/performance technology help optimize enterprise storage efficiency, with the 12TB SATA configuration rated at 6.3W average Idle A power.
• Super Parity and Enterprise Data Integrity : Super Parity, SMART monitoring, on-the-fly error correction, and advanced cache technology strengthen the drive’s enterprise data-management foundation.
• Hot-Plug SATA Support : The current 2025 datasheet lists hot-plug support according to Serial ATA Revision 3.5, while the interface itself operates at SATA 6Gb/s.
• ONE-Year Limited Warranty : Seagate lists a one-year limited warranty for the 12TB Exos configuration in the supplied current datasheet.

Expert Specs