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Fast SAS drive suitable for transactional workloads.
846524-B21
HP 1TB 3.5-INCH LFF SAS 12GB/S 7.2K RPM 512N MDL DS HOT-PLUG...
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Name:
846524-B21
- Description:
- HP 1TB 3.5-INCH LFF SAS 12GB/S 7.2K RPM 512N MDL DS HOT-PLUG HDD
- Rating:
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- Brand:
- Hpe
- Condition:
- Warranty:
- 3
- List Price:
$423.88
- Price:
$169.5560% off
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846524-B21 Overview
846524-B21 is a high-performance HDD designed in a 3.5-inch form factor and built with a SATA III interface. It delivers a reliable 7200 RPM spindle speed, 4 TB of storage capacity, and a 256 MB cache, paired with an impressive MTBF of 2,000,000 hours and a rated reliability designed for continuous operation. This drive is engineered to handle heavy workloads while maintaining optimal performance in various environments.
846524-B21 offers excellent power efficiency with a read/write consumption of 8 W and idle consumption of 5 W. Featuring advanced capabilities such as helium-sealed construction, integrated vibration protection, and dual actuator technology, it is ideally suited for data centers, desktop systems, NAS devices, and surveillance applications where dependable, high-volume storage is critical.
846524-B21 price is $169.55, a 60% saving from the Hpe list price of $423.88. 846524-B21 is in stock and available for next-day dispatch. (terms applied)
Request bulk order quote for 846524-B21 for additional pricing. Browse the full Hpe Server 3.5" Hard Drives series or explore all Hpe products.
846524-B21 Specifications
- Product Type
- Hard Drive
- Drive Type
- HDD
- Use Case
- Desktop / Server / NAS / Surveillance / Enterprise Storage
- Interface
- SATA III
- Form Factor
- 3.5-inch
- Storage Capacity
- 4 TB
- Spindle Speed (RPM)
- 7200 RPM
- Cache (Buffer Size)
- 256 MB
- Average Latency
- N/A
- Data Transfer Rate
- Up to 250 MB/s
- Annual Workload Rating
- 300 TB/yr
- Power Consumption (Read/Write)
- 8 W
- Power Consumption (Idle)
- 5 W
- Encryption Support
- AES 256-bit
- Helium Sealed
- Helium-Sealed
- Drive Bays Supported
- Multi-bay
- Vibration Protection
- Yes
- Advanced Features
- Dual Actuator
- Operating Temperature
- 5–60°C
- Product Name
- 846524-B21 Enterprise HDD
- Height
- 1 in
- Width
- 5.79 in
- Depth
- 4 in
- Weight
- 2.0 lbs
846524-B21 Use Case
Accelerating Enterprise Transactional Databases with 846524-B21-HP SAS HDD
In a global financial services firm running high-volume SQL and Oracle workloads, the 846524-B21-HP 1TB 3.5-inch LFF SAS 12 Gb/s 7.2K RPM hot-plug HDD delivers low-latency, consistent I/O for transaction processing. By integrating these drives into HP ProLiant DL380 Gen10 servers, IT teams achieve predictable sub-5 ms response times and 24/7 uptime, improving customer satisfaction and reducing costly database locks.
Optimizing Virtualization Storage Tiers in VMware Environments
An e-commerce retailer consolidates hundreds of virtual machines on an HPE Synergy platform using 846524-B21-HP 1TB SAS hot-plug HDDs to separate cold and warm VM workloads. The 12 Gb/s interface maximizes throughput for non-critical VMs, freeing SSD capacity for performance-sensitive applications and lowering infrastructure cost by 30% while sustaining enterprise-grade reliability.
Scalable Nearline Backup and Archival for Compliance
A healthcare provider implements an on-premise backup cluster with HPE DL360 Gen10 servers populated with 846524-B21-HP 1TB SAS 7.2K RPM HDDs for daily imaging and long-term retention. The hot-plug design ensures rapid drive replacement, and 512e sector formatting boosts sequential write speeds, enabling 100 TB of compliant, redundant backups with 99.9% data availability and simplified regulatory audits.
Quality Certifications
To get the detailed certification, please go to the Compliance Center.
Product Comparison Table 
 846524-B21 |  819201-B21 |  K2P87B |  793665-B21 |  861691-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 | Desktop / Server / NAS / Surveillance / Enterprise Storage | Desktop / Server / NAS / Surveillance / Enterprise Storage |
| Interface | SATA III | SAS 12Gb/s | 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 | 4 TB | 12 TB | 10 TB | 4 TB | 4 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 | 128 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 210 MB/s |
| Annual Workload Rating | 300 TB/yr | 550 TB/yr | 550 TB/yr | 550 TB/yr | 550 TB/yr |
| Power Consumption (Read/Write) | 8 W | 9.0 Watts | 9 Watts | 9.0 Watts | 8 Watts |
| Power Consumption (Idle) | 5 W | 6.0 Watts | 7 Watts | 5.0 Watts | 5 Watts |
| Encryption Support | AES 256-bit | AES 256-bit | AES 256-bit | No | 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 | 5–60°C | 5–60°C | 5–60°C | 5–60°C | 5–60°C |
| Product Name | 846524-B21 Enterprise HDD | Seagate Exos Enterprise 12TB 819201-B21 SAS HDD | K2P87B | 793665-B21 High Performance Enterprise HDD | 861691-B21 Enterprise HDD |
| Height | 1 in | 1.03 inches | 1.03 inches | 1.03 inches | 1.03 |
| Width | 5.79 in | 5.79 inches | 5.78 inches | 5.79 inches | 5.79 |
| Depth | 4 in | 4.02 inches | 4.00 inches | 4.00 inches | 4.0 |
| Weight | 2.0 lbs | 3.3 lbs | 1.8 lbs | 1.65 lbs | 1.8 |
Reviews & Ratings
H
Hammad Iqbal
4
Low latency and consistent IOPS.
Y
Yann Morel
5
OEM drive ensured stability.
T
Touseef Ahmed
5
Good choice for performance tiers.
U
Ulf Johansson
5
Strong enterprise disk.
Questions & Answers
What is the storage capacity of the HP 846524-B21 HDD?
The HP 846524-B21 offers 1 TB of raw storage capacity, ideal for data-intensive applications.
Which interface does this HP 3.5-inch HDD use?
This drive uses a 12 Gb/s SAS interface, delivering high-throughput data transfer and enterprise-class reliability.
What is the form factor of the HP 846524-B21 drive?
It is a 3.5-inch large form factor (LFF) HDD, designed for compatible HP ProLiant and Integrity server bays.
What spindle speed does the HP 1 TB SAS HDD operate at?
The drive spins at 7,200 RPM, balancing performance and energy efficiency for mixed-workload environments.
What sector format does the HP 846524-B21 use?
It uses 512n (512-byte) native sectors, ensuring broad compatibility with operating systems and RAID controllers.
Is the HP 846524-B21 HDD hot-pluggable?
Yes. It supports hot-plug insertion and removal, enabling easy drive swaps without server downtime.
Which HP server models are compatible with this drive?
This HDD is fully compatible with HP ProLiant DL, ML, BL, and Integrity servers that support 3.5″ SAS 12 Gb/s disks.
Can I use the HP 846524-B21 in RAID configurations?
Yes. It integrates seamlessly with HP Smart Array controllers for RAID 0, 1, 5, 6, 10, 50, and 60 configurations.
What is the mean time between failures (MTBF) rating?
The drive is rated for up to 2.5 million hours MTBF, delivering high availability for enterprise workloads.
What warranty covers the HP 846524-B21 hard drive?
This HDD is backed by a one-year limited warranty from HP and can be covered under extended Care Pack plans.
What are the typical power consumption figures?
It consumes approximately 7 W at idle and up to 11 W during active read/write operations, optimizing energy use.
What operating temperature range is supported?
The drive operates reliably between 5 °C and 55 °C (41 °F to 131 °F) with recommended humidity levels.
How much noise does the HP 846524-B21 generate?
Typical operating acoustics are around 2.1 bels, minimizing disruption in data center and office environments.
Is firmware update required before deployment?
HP recommends verifying and applying the latest firmware via Integrated Lights-Out (iLO) or Smart Update Manager for optimal performance.
What are common use cases for this HDD?
Ideal for virtualization, database storage, backup, and high-capacity archival workloads in HP server environments.
Can I mix this SAS drive with SATA drives in the same enclosure?
While the enclosure may support both, HP advises grouping SAS and SATA drives separately to maintain performance and compatibility.