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781516-B21
- Description:
- HP 600GB 12G SAS 10K rpm SFF (2.5-inch) SC Enterprise 3yr Warranty Hard Drive For Use with Gen8/Gen9 or Newer
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Our best-in-class warranties
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Extended protection, enterprise-grade.
All enterprise hardware is backed by a 3-year warranty — triple the industry standard — covering defects under normal use.
Professional repairs & replacements.
If a hardware issue is confirmed, we’ll repair or replace the unit. Replacement parts carry either original or 3-month coverage.
RMA process, simplified.
Once an RMA is approved, return the defective unit within 10 days. We handle the rest — no service gaps.
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All equipment includes a 30-day replacement warranty. If something goes wrong, we’ll repair or swap it — fast.
Replacements shipped in 10 days or less.
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RMA protocol keeps it smooth.
Just ensure all accessories and original packaging are intact — we’ll take care of the technical validation.
781516-B21
HP 600GB 12G SAS 10K rpm SFF (2.5-inch) SC Enterpr...
$551.35
$220.54
5 in Global Warehouse
$220.54
60% off
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781516-B21 Overview
781516-B21 is a high-performance HDD designed in a 3.5-inch form factor with a SATA III interface, delivering 4 TB of storage capacity, a spindle speed of 7200 RPM, and a 64 MB cache. It is engineered for relentless operation with an MTBF of 1,000,000 hours and is rated for 8,760 hours per year, ensuring reliable service in demanding environments.
This drive features low power consumption with 8 Watts during read/write operations and 5 Watts when idle. With AES 256-bit encryption support, helium-sealed construction, and vibration protection, 781516-B21 is ideally suited for data centers, desktops, NAS systems, and surveillance applications.
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781516-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) | 64 MB |
| Average Latency | N/A |
| Data Transfer Rate | Up to 210 MB/s |
| Annual Workload Rating | 180 TB/yr |
| Power Consumption (Read/Write) | 8 Watts |
| Power Consumption (Idle) | 5 Watts |
| Encryption Support | AES 256-bit |
| Helium Sealed | Helium-Sealed |
| Drive Bays Supported | Multi-bay |
| Vibration Protection | Yes |
| Advanced Features | N/A |
| Operating Temperature | 5–55°C |
| Product Name | 781516-B21 4TB Enterprise HDD |
| Height | 1.03 inches |
| Width | 5.8 inches |
| Depth | 4.0 inches |
| Weight | 1.5 lbs |
781516-B21 Use Case
Accelerate Mission-Critical OLTP on HP ProLiant Gen8/Gen9 Servers
Deploy the HP 781516-B21 600GB 12G SAS 10K rpm SFF (2.5-inch) SC Enterprise 3yr Warranty Hard Drive in a ProLiant Gen8/Gen9 host running Microsoft SQL Server for high-volume transaction processing. Benefit: Reduces I/O wait times by 25%, delivers sub-5 ms latency and sustains 150,000 IOPS, ensuring consistent transaction throughput and near-zero downtime for financial or e-commerce platforms.
Scale VMware vSphere Virtual Desktop Infrastructure
Integrate the HP 781516-B21 600GB 12G SAS 10K rpm SFF (2.5-inch) SC Enterprise 3yr Warranty Hard Drive into Gen8/Gen9 blade servers to power VMware vSphere VDI deployments. Benefit: Supports high IOPS density with steady 200 MB/s throughput per drive, enabling up to 120 concurrent desktops per chassis and delivering smooth multimedia performance under heavy user loads.
Optimize Real-Time Big Data Analytics in Hybrid Cloud
Use the HP 781516-B21 600GB 12G SAS 10K rpm SFF (2.5-inch) SC Enterprise 3yr Warranty Hard Drive within HP Gen8/Gen9 servers for Hadoop or Spark clusters in a hybrid cloud setup. Benefit: Ensures sustained 500 MB/s sequential throughput and under 10 ms random access times, accelerating data processing by 30% and enabling rapid insights from large-scale datasets.
Quality Certifications
To get the detailed certification, please go to the Compliance Center.
Product Comparison Table
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| Advanced Features | N/A | Dual Actuator | Dual Actuator | Dual Actuator | Dual Actuator |
| Annual Workload Rating | 180 TB/yr | 550 TB/yr | 550 TB/yr | 180 TB/yr | 550 TB/yr |
| Average Latency | N/A | N/A | 4.16 ms | N/A | N/A |
| Cache (Buffer Size) | 64 MB | 256 MB | 256 MB | 128 MB | 256 MB |
| Data Transfer Rate | Up to 210 MB/s | Up to 250 MB/s | Up to 250 MB/s | Up to 210 MB/s | Up to 250 MB/s |
| Depth | 4.0 inches | 4.00 inches | 7.25 inches | 4 inches | 4.00 inches |
| Drive Bays Supported | Multi-bay | Multi-bay | Multi-bay | Multi-bay | Multi-bay |
| Drive Type | HDD | HDD | HDD | HDD | HDD |
| Encryption Support | AES 256-bit | AES 256-bit | AES 256-bit | No | AES 256-bit |
| Form Factor | 3.5-inch | 3.5-inch | 3.5-inch | 3.5-inch | 3.5-inch |
| Height | 1.03 inches | 1.03 inches | 1.03 inches | 1 inch | 1.03 inches |
| Helium Sealed | Helium-Sealed | Helium-Sealed | Helium-Sealed | Helium-Sealed | Helium-Sealed |
| Interface | SATA III | SATA III | SAS 12Gb/s | SATA III | SATA III |
| Operating Temperature | 5–55°C | 5–60°C | 5–60°C | 5–60°C | 5–55°C |
| Power Consumption (Idle) | 5 Watts | 6 Watts | 6.0 Watts | 5 Watts | 6.0 Watts |
| Power Consumption (Read/Write) | 8 Watts | 8 Watts | 8.5 Watts | 8 Watts | 8.5 Watts |
| Product Name | 781516-B21 4TB Enterprise HDD | 605835-B21 Enterprise HDD | 652749-B21 Enterprise 10TB Helium-Sealed HDD | 802891-B21 High-Performance HDD | Q2T63A 10TB Enterprise HDD |
| Product Type | Hard Drive | Hard Drive | Hard Drive | Hard Drive | Hard Drive |
| Spindle Speed (RPM) | 7200 RPM | 7200 RPM | 7200 RPM | 7200 RPM | 7200 RPM |
| Storage Capacity | 4 TB | 4 TB | 10 TB | 4 TB | 10 TB |
| Use Case | Desktop / Server / NAS / Surveillance / Enterprise Storage | Desktop / Server / NAS / Surveillance / Enterprise Storage | Enterprise Storage | Desktop / Server / NAS / Surveillance / Enterprise Storage | Desktop / Server / NAS / Surveillance / Enterprise Storage |
| Vibration Protection | Yes | Yes | Yes | Yes | Yes |
| Weight | 1.5 lbs | 1.60 lbs | 2.2 lbs | 2.2 lbs | 2.2 lbs |
| Width | 5.8 inches | 5.79 inches | 5.79 inches | 5.8 inches | 5.79 inches |
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Questions & Answers
Q
What is the storage capacity of the HP 781516-B21 hard drive?
A
The HP 781516-B21 (600GB 12G SAS 10K rpm SFF) hard drive provides 600GB of usable capacity.
Q
Which interface does the HP 781516-B21 drive use?
A
This drive uses a 12Gb/s SAS interface for high-speed, enterprise-grade connectivity.
Q
What is the rotational speed of the HP 781516-B21 drive?
A
The HP 781516-B21 operates at 10,000 RPM, ensuring low latency and consistent performance.
Q
What form factor is the HP 781516-B21 hard drive?
A
The HP 781516-B21 is a 2.5-inch (SFF) hard drive designed for space-efficient server bays.
Q
Which HP server generations are compatible with the 781516-B21 drive?
A
The HP 781516-B21 is fully compatible with Gen8, Gen9 and newer HP ProLiant servers.
Q
What warranty coverage comes with the HP 781516-B21 hard drive?
A
The HP 781516-B21 includes a 3-year SC Enterprise warranty for onsite replacement and support.
Q
Is the HP 781516-B21 drive hot-swappable?
A
Yes. The HP 781516-B21 supports hot-swap operation for maintenance without server downtime.
Q
What is the MTBF (mean time between failures) for this drive?
A
The HP 781516-B21 has an MTBF of up to 2 million hours for enterprise reliability.
Q
Can the HP 781516-B21 be used in RAID configurations?
A
Yes. This 12G SAS drive supports software and hardware RAID levels 0, 1, 5, 6 and 10.
Q
What data transfer rates does the HP 781516-B21 deliver?
A
The drive delivers up to 205 MB/s sequential transfer rates over the 12Gb/s SAS interface.
Q
What are the typical use cases for the HP 781516-B21 hard drive?
A
Ideal for virtualization, database applications, and high-transaction enterprise storage.
Q
How do I install the HP 781516-B21 in an HP ProLiant Gen8/Gen9 server?
A
Insert the drive into an available 2.5″ SAS bay until it clicks, then confirm detection in the server BIOS/Array Controller utility.
Q
Is the HP 781516-B21 backward compatible with 6Gb/s SAS controllers?
A
Yes. The HP 781516-B21 supports backward compatibility with 6Gb/s SAS controllers at reduced throughput.
Q
Does the HP 781516-B21 support self-encryption features?
A
This model does not include self-encrypting drive (SED) functionality; encryption must be managed externally.
Q
Can I use the HP 781516-B21 as a hot spare drive?
A
Yes. You can configure the HP 781516-B21 as a global or dedicated hot spare in your RAID array.
Q
How do I troubleshoot connectivity issues with the HP 781516-B21?
A
Verify SAS cable/port integrity, confirm firmware is up to date, and check the server’s storage controller logs for errors.
