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Midline SAS drive delivered stable performance for file storage.
818365-B21
HPE 2TB SAS 12G Midline 7.2K LFF (3.5in) SC 1yr Warranty HDD
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818365-B21
HPE 2TB SAS 12G Midline 7.2K LFF (3.5in) SC 1yr Warranty HDD
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818365-B21 is a high-performance HDD engineered for enterprise storage environments, available in a versatile 3.5-inch form factor with support for both SATA III and SAS 12Gb/s interfaces. It features a 7200 RPM spindle speed, an 8 TB storage capacity paired with a 256 MB buffer, and is designed to handle demanding workloads rated at 550 TB/yr with a robust MTBF of 2,000,000 hours and high reliability for continuous 24/7 operation.
818365-B21 combines optimized power consumption—with approximately 8 Watts during read/write operations and 5 Watts when idle—with advanced design features such as a helium-sealed construction, vibration protection, and dual actuator technology. These attributes make it perfectly suited for data centers, high-performance desktops, NAS systems, and surveillance applications while fitting standard dimensions of 1 inch in height, 5.8 inches in width, 4 inches in depth, and weighing around 1.2 lbs.
818365-B21 price is $221.80, a 64% saving from the Hpe list price of $616.09. 818365-B21 is in stock and available for next-day dispatch. (terms applied)
Request bulk order quote for 818365-B21 for additional pricing. Browse the full Hpe Server 3.5" Hard Drives series or explore all Hpe products.
Scenario: A mid-sized financial services firm implements the 818365-B21-HPE 2TB SAS 12G Midline 7.2K LFF HDD in a RAID-6 SAN array to store daily transactional backups and offsite replication data. Outcome: Delivers sustained 12 Gb/s throughput, achieves 99.99% availability, reduces nightly backup window by 40%, and strengthens RTO/RPO metrics for regulatory compliance.
Scenario: An IT managed-services provider hosts over 200 virtual machines on HPE ProLiant servers, using the 818365-B21-HPE 2TB SAS 12G Midline HDD as the mid-tier storage layer. Outcome: Balances sequential and random I/O, boosts VM performance by 25%, supports higher VM density per chassis, and lowers cost per virtual machine compared to all-flash tiers.
Scenario: A university security operations center records 4K CCTV streams 24/7 and requires cost-effective bulk storage. By deploying the 818365-B21-HPE 2TB SAS 12G Midline 7.2K LFF HDD in a scalable NAS solution, the team ensures continuous write performance. Outcome: Sustains aggregate write speeds above 300 MB/s, extends archival retention to 90 days, and reduces storage CAPEX by 20% versus enterprise-class drives.
To get the detailed certification, please go to the Compliance Center.
 818365-B21 |  801884-B21 |  843270-B21 |  804584-B21 |  804628-B21 | |
|---|---|---|---|---|---|
| Product Type | Hard Drive | Hard Drive | Hard Drive | Hard Drive | Hard Drive |
| Drive Type | HDD | HDD | HDD | HDD | HDD |
| Use Case | Enterprise Storage | Enterprise Storage | Desktop / Server / NAS / Surveillance / Enterprise Storage | Desktop / Server / NAS / Surveillance / Enterprise Storage | Desktop / Server / NAS / Surveillance / Enterprise Storage |
| Interface | SATA III | SATA III | SATA III | SATA III | SATA III |
| Form Factor | 3.5-inch | 3.5-inch | 3.5-inch | 3.5-inch | 3.5-inch |
| Storage Capacity | 8 TB | 8 TB | 16 TB | 8 TB | 8 TB |
| Spindle Speed (RPM) | 7200 RPM | 7200 RPM | 7200 RPM | 7200 RPM | 7200 RPM |
| Cache (Buffer Size) | 256 MB | 256 MB | 256 MB | 256 MB | 256 MB |
| Average Latency | N/A | N/A | N/A | N/A | N/A |
| Data Transfer Rate | Up to 250 MB/s | Up to 250 MB/s | Up to 250 MB/s | Up to 250 MB/s | Up to 250 MB/s |
| Annual Workload Rating | 550 TB/yr | 550 TB/yr | 550 TB/yr | 300 TB/yr | 550 TB/yr |
| Power Consumption (Read/Write) | 8 Watts | 8 Watts | 8 Watts | 9.0 Watts | 8 Watts |
| Power Consumption (Idle) | 5 Watts | 6 Watts | 6 Watts | 5.5 Watts | 4 Watts |
| Encryption Support | AES 256-bit | No | AES 256-bit | AES 256-bit | AES 256-bit |
| Helium Sealed | Helium-Sealed | Helium-Sealed | Helium-Sealed | Helium-Sealed | Helium-Sealed |
| Drive Bays Supported | Multi-bay | Multi-bay | Multi-bay | Multi-bay | Multi-bay |
| Vibration Protection | Yes | Yes | Yes | Yes | Yes |
| Advanced Features | Dual Actuator | Dual Actuator | Dual Actuator | Dual Actuator | Dual Actuator |
| Operating Temperature | 5–55°C | 5–60°C | 5–60°C | 5–60°C | 5–60°C |
| Product Name | 818365-B21 Enterprise Series HDD | 801884-B21 Enterprise HDD | 843270-B21 16TB Enterprise HDD | 804584-B21 Enterprise SATA HDD 8TB | 804628-B21 |
| Height | 1 inches | 1.03 inches | 1.03 inches | 1.03 inches | 1.03 inches |
| Width | 5.8 inches | 5.79 inches | 5.79 inches | 4.00 inches | 4.00 inches |
| Depth | 4 inches | 7.78 inches | 4.01 inches | 5.79 inches | 5.80 inches |
| Weight | 1.2 lbs | 2.2 lbs | 1.6 lbs | 1.5 lbs | 1.16 lbs |
Midline SAS drive delivered stable performance for file storage.
Good capacity and consistent throughput.
OEM firmware worked without issues.
Reliable HDD for enterprise use.
Solid and dependable.
The HPE 2TB SAS 12G Midline 7.2K LFF (3.5in) HDD, part number 818365-B21, is an enterprise-grade hard drive offering 2 TB capacity, 12 Gb/s SAS interface, 7,200 RPM spindle speed, and a one-year limited warranty.
This drive uses a 12 Gb/s Serial Attached SCSI (SAS) interface for high-throughput, low-latency data transfers in enterprise storage systems.
It delivers 2 TB of storage with a 7,200 RPM rotational speed, balancing cost-effective capacity with mid-level performance for sequential workloads.
“Midline” indicates a balanced, cost-optimized design suitable for less-intensive workloads such as backups, archiving, and secondary storage.