Expert Features

• 20TB Enterprise Capacity : Massive storage for hyperscale environments, enterprise servers, high-density data centers, object storage, distributed file systems, analytics platforms, and serious NAS deployments.
• SATA 6Gb/s Interface : Model 0F38785 is specifically the SATA version, making it compatible with enterprise systems and storage controllers that support standard SATA drives.
• 7200 RPM Performance : Enterprise-class 7200 RPM rotational speed keeps bulk-storage performance much stronger than slower archival drives.
• Up to 291MB/s Sustained Transfer : Delivers up to 291MB/s maximum sustained throughput, giving large sequential workloads proper data-center muscle.
• 512MB Data Buffer : A generous 512MB cache helps the drive manage heavy sequential transfers and demanding multi-user storage activity.
• CMR Recording Format : Uses Conventional Magnetic Recording, making it suitable for standard enterprise applications without host-managed zoned-storage requirements.
• EAMR / ePMR Technology : Energy-assisted recording improves areal density while maintaining the familiar behavior of a conventional enterprise hard drive.
• OptiNAND Architecture : Integrates embedded iNAND flash for expanded metadata handling and smarter firmware operation. OptiNAND is not hybrid storage and does not act as a user-accessible SSD cache.
• Nine-Disk Helium Platform : Stores 20TB across a nine-disk platform with approximately 2.2TB per platter, supported by Western Digital’s field-proven HelioSeal design.
• Triple-Stage Actuator : TSA technology improves head-positioning accuracy at the extremely high track densities required for 20TB enterprise storage.
• 550TB Annual Workload : Designed to handle workloads of up to 550TB per year, making it ready for far heavier activity than ordinary desktop hard drives.
• 24×7 Enterprise Operation : Built for continuous operation in always-on servers, storage arrays, cloud platforms, and data-center systems.
• 2.5-Million-Hour MTBF : Projected 2.5 million hours MTBF, paired with a projected 0.35% annualized failure rate under specified operating conditions.
• Base SE Security Configuration : This exact model is Base SE, meaning it does not include drive encryption; it supports sanitize overwrite functionality instead.

Expert Specs