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858594-B21
HP 1TB 3.5 LFF SATA 6GB/S 7.2K RPM_X000D_ 512N MDL HOT-PLUG...
Federal agencies and Fortune 500 operations source through ORM Systems.
US Government & Defense
Enterprise Clients
Regional teams and 25+ distribution partners keep stock near you and accountability in your time zone.
Pay by PayPal or Revolut with full chargeback rights. Order on PO terms, Net-30 for government.
Every registration we claim is public record — check our federal contractor status yourself before you spend a dollar.
Ten years serving buyers who audit their vendors. From federal agencies to 20,000+ enterprise clients worldwide.
858594-B21 is an HDD engineered as a 3.5-inch drive featuring a SATA III interface, designed to deliver robust enterprise storage performance. It offers a 8 TB capacity with a 7200 RPM spindle speed and a generous 256 MB cache while maintaining a high annual workload rating of 550 TB/yr and an MTBF of 2,000,000 hours, ensuring reliable operation rated for continuous use.
This enterprise HDD is ideally suited for use in data centers, desktops, NAS, and surveillance environments, with low power consumption of approximately 8.5 Watts during active read/write operations and 5.5 Watts during idle. Advanced features include a helium-sealed design, vibration protection, and dual actuator technology that further boost performance and reliability in multi-drive, multi-bay systems.
858594-B21 price is $175.14, a 13% saving from the Hpe list price of $201.32. 858594-B21 is in stock and available for next-day dispatch. (terms applied)
Request bulk order quote for 858594-B21 for additional pricing. Browse the full Hpe Server 3.5" Hard Drives series or explore all Hpe products.
In enterprise virtualization clusters running VMware vSphere or Microsoft Hyper-V, the 858594-B21-HP 1TB 3.5″ LFF SATA 6Gb/s 7.2K RPM hot-plug HDD delivers scalable block storage for VM sprawl. Hot-swap capability minimizes downtime during live host maintenance, while 512e sector format ensures maximum compatibility. Outcome: Seamless capacity scaling with zero service interruption and predictable I/O performance under heavy VM consolidation.
For SMB and mid-market SAN deployments leveraging HPE StoreVirtual or StoreOnce, this 1TB SATA drive provides high-capacity, cost-optimized secondary storage for daily backups and long-term data retention. Enterprise-grade reliability and hot-plug design reduce RMA events and streamline drive replacement. Outcome: Improved backup window consistency, reduced storage TCO, and rapid restore times for compliance and audit requirements.
In distributed surveillance nodes requiring 24×7 continuous recording, the 858594-B21-HP 1TB SATA HDD offers sustained write throughput for HD camera streams. Hot-swappable bays allow field technicians to replace drives without system reboot, preserving recording continuity. Outcome: Reliable, high-capacity storage for critical video evidence, simplified maintenance workflows, and guaranteed retention policies.
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| 858594-B21 |  801884-B21 |  P04529-B21 |  833926-B21 |  804642-B21 | |
|---|---|---|---|---|---|
| Product Type | Hard Drive | Hard Drive | Hard Drive | Hard Drive | Hard Drive |
| Drive Type | HDD | HDD | HDD | HDD | HDD |
| Use Case | Desktop / Server / NAS / Surveillance / 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 | 4 TB | 10 TB | 4 TB |
| Spindle Speed (RPM) | 7200 RPM | 7200 RPM | 7200 RPM | 7200 RPM | 7200 RPM |
| Cache (Buffer Size) | 256 MB | 256 MB | 128 MB | 256 MB | 64 MB |
| Data Transfer Rate | Up to 210 MB/s | Up to 250 MB/s | Up to 250 MB/s | Up to 250 MB/s | Up to 210 MB/s |
| Annual Workload Rating | 550 TB/yr | 550 TB/yr | 180 TB/yr | 550 TB/yr | 550 TB/yr |
| Power Consumption (Read/Write) | 8.5 Watts | 8 Watts | 8 Watts | 8.5 Watts | 8.7 Watts |
| Power Consumption (Idle) | 5.5 Watts | 6 Watts | 5 Watts | 6.5 Watts | 6.1 Watts |
| Encryption Support | AES 256-bit | No | No | AES 256-bit | No |
| 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 | Rotational Vibration Sensors | Dual Actuator |
| Operating Temperature | 5–55°C | 5–60°C | 5–60°C | 5–60°C | 5–55°C |
| Product Name | 858594-B21 Enterprise HDD | 801884-B21 Enterprise HDD | P04529-B21 | HGST Ultrastar 10TB Enterprise HDD | 804642-B21 Enterprise SATA HDD |
| Height | 1.030 inches | 1.03 inches | 1.03 inches | 1.03 inches | 1.0 inches |
| Width | 4.010 inches | 5.79 inches | 5.78 inches | 4.00 inches | 5.8 inches |
| Depth | 5.789 inches | 7.78 inches | 8.37 inches | 5.78 inches | 4.0 inches |
| Weight | 2.20 lbs | 2.2 lbs | 1.8 lbs | 1.90 lbs | 2.0 lbs |
Every unit is authentic, sourced through trusted and authorised channels, and serial-verified on request. Genuine networking and IT hardware, guaranteed, or your money back.
New products are backed by up to 3 years of extended warranty, and certified refurbished units by up to 3 months, for dependable protection on every order. Coverage is clear, honoured in full, and confirmed on each product page.
If a unit ever falls short, our streamlined RMA process gets a replacement to you fast, with advance replacement available to keep your network running. No jargon, no runaround.
Every device is inspected, bench-tested, and firmware-verified, with configurations wiped before dispatch. Additional testing can be arranged to confirm full working condition on request.
Our specialists assist with compatibility, configuration, licensing, and installation, before and after you buy. Real hardware expertise, whenever you need it.
dispatched quickly and shipped worldwide from regional hubs, fully tracked and insured.
Entry level SATA drive that performs as expected.
Quiet drive with consistent speeds.
Good replacement disk for legacy servers.
Simple installation and reliable operation.
Suitable for light workloads.
The HP 858594-B21 hot-plug hard drive offers 1 TB of native storage capacity.
This drive uses a standard SATA 6 Gb/s interface for data transfer.
The HP 858594-B21 is a 3.5-inch large form factor (LFF) hard drive.
The hard drive spins at 7,200 RPM for balanced performance and reliability.
Yes. The drive is fully hot-plug capable for easy replacement without shutdown.
The drive uses 512-byte native sectors (512N) for broad compatibility.
Yes. The 858594-B21 is validated for use in HP ProLiant Gen8 and Gen9 server series.
Yes. It supports hardware RAID setups when paired with a compatible RAID controller.
This drive delivers up to 6 Gb/s SATA throughput, with typical sustained rates around 150 MB/s.
The HP 1 TB SATA HDD has an MTBF rating of 1.4 million hours.
HP provides a standard three-year limited warranty on the 858594-B21 drive.
Dimensions are 146 mm × 101.6 mm × 25.4 mm (L × W × H).
Typical power consumption is 7 W during read/write operations and 4 W at idle.
The drive operates between 5 °C and 55 °C ambient temperature.
Slide the drive into an available hot-plug bay, secure the tray, and allow the server to detect it automatically.
The full model identifier is HP 1 TB 3.5” LFF SATA 6 Gb/s 7.2K RPM 512N MDL Hot-Plug HDD (858594-B21).
United States
