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Neil Carter
5
Blank kit fit neatly and maintained airflow.
666987-B21
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SFF HDD BLANK KIT PL=SI
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Name:
666987-B21
- Description:
- SFF HDD BLANK KIT PL=SI
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Added to cart 28 times recently
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- Hpe
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666987-B21 Overview
666987-B21 is a high-performance HDD engineered with a 3.5-inch form factor, SATA III interface, and a 7200 RPM spindle speed. It delivers a robust 4 TB capacity paired with a 256 MB cache, an annual workload rating of 180 TB/yr, and an MTBF rated at 2,500,000 hours to ensure reliable operation in enterprise environments.
666987-B21 is designed for versatile drive usage including desktop, server, NAS, and surveillance applications. It features advanced helium-sealed technology, integrated vibration protection, and dual actuator mechanisms, while operating at 7 Watts during read/write and 5 Watts in idle mode. This makes the drive ideally suited for data centers, high-performance desktops, NAS arrays, and surveillance systems.
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666987-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 210 MB/s
- Annual Workload Rating
- 180 TB/yr
- Power Consumption (Read/Write)
- 7 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
- Dual Actuator
- Operating Temperature
- 5–60°C
- Product Name
- 666987-B21
- Height
- 1.03 inches
- Width
- 5.8 inches
- Depth
- 4.0 inches
- Weight
- 1.6 lbs
666987-B21 Use Case
Airflow Optimization in High-Density Data Centers
In a Fortune 500 data center running HPE ProLiant DL380 Gen10 servers, IT teams install the 666987-B21-SFF HDD BLANK KIT PL=SI into unused SFF drive bays to maintain consistent front-to-rear airflow. This targeted airflow management prevents CPU and memory hotspots, reduces cooling power consumption by up to 15%, and enhances overall server reliability.
Hot-Swap Drive Bay Integrity During Enterprise Maintenance
During planned upgrades on an SAP ECC cluster, system engineers deploy the 666987-B21-SFF HDD BLANK KIT PL=SI to occupy vacant SFF slots on HPE storage nodes. This preserves backplane signal integrity, safeguards RAID configurations, and facilitates seamless hot-swap operations without triggering fault alerts. The result is minimized downtime and uninterrupted business continuity.
Dust and Contaminant Protection for Edge Server Deployments
In remote telecom edge sites with limited air filtration, field technicians use the 666987-B21-SFF HDD BLANK KIT PL=SI to seal idle SFF bays on HPE MicroServer platforms. This barrier stops dust ingress, cuts down maintenance cycles by 30%, and prolongs HDD and backplane life. Benefit: reduced onsite service costs and higher system availability in challenging environments.
Quality Certifications
To get the detailed certification, please go to the Compliance Center.
Product Comparison Table 
| 666987-B21 |  N9X95A |  725572-B21 |  N9X92A |  872223-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 | Desktop / Server / NAS / Surveillance / Enterprise Storage | Desktop / Server / NAS / Surveillance / Enterprise Storage | Desktop / Server / NAS / Surveillance | 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 | 4 TB | 8 TB | 4 TB | 10 TB | 8 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 | 256 MB |
| Average Latency | N/A | 4.2 ms | N/A | N/A | 4.17 ms |
| Data Transfer Rate | Up to 210 MB/s | Up to 250 MB/s | Up to 210 MB/s | Up to 250 MB/s | Up to 210 MB/s |
| Annual Workload Rating | 180 TB/yr | 550 TB/yr | 300 TB/yr | 550 TB/yr | 550 TB/yr |
| Power Consumption (Read/Write) | 7 Watts | 7.5 Watts | 8.5 Watts | N/A | 8 Watts |
| Power Consumption (Idle) | 5 Watts | 4 Watts | 5.5 Watts | N/A | 6 Watts |
| Encryption Support | AES 256-bit | AES 256-bit | 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 | 5–60°C | 5–60°C | 5–55°C | 5–60°C | 5–60°C |
| Product Name | 666987-B21 | N9X95A Enterprise Helium-Sealed 8TB 7200 RPM SATA III HDD | 725572-B21 4TB 7200 RPM SATA III Enterprise HDD | N9X92A Enterprise HDD | 872223-B21 Enterprise Helium-Sealed HDD |
| Height | 1.03 inches | 1.0 inches | 1.04 inches | 1.03 inches | 1.03 inches |
| Width | 5.8 inches | 4.0 inches | 5.78 inches | 5.79 inches | 5.79 inches |
| Depth | 4.0 inches | 5.8 inches | 4.00 inches | 4 inches | 4.00 inches |
| Weight | 1.6 lbs | 2.1 lbs | 1.7 lbs | 2.0 lbs | 1.5 lbs |
Reviews & Ratings
F
Fahad Ali
5
OEM filler matched chassis perfectly.
J
Jens Petersen
5
Simple and effective.
C
Chris Morgan
4
Good quality blank.
A
Alberto Ruiz
5
Clean finish.
Questions & Answers
What is the 666987-B21 SFF HDD blank kit?
The 666987-B21 SFF HDD blank kit is a Small Form Factor drive bay filler designed to maintain optimal airflow and protect empty SAS/SATA backplane slots in compatible HP ProLiant servers.
Which servers are compatible with the 666987-B21 blank kit?
This kit is compatible with HP ProLiant DL and ML series servers featuring SFF drive bays and standard SAS/SATA backplanes.
What is the primary function of a hard drive blanking kit?
A hard drive blanking kit preserves system cooling efficiency by sealing unused drive bays and preventing air recirculation.
How do I install the SFF HDD blank kit in my server?
Align the blank panel with the empty drive bay, press it firmly until it locks into the ejector mechanism, and secure with the included retention clip if required.
Does the 666987-B21 kit include all necessary mounting hardware?
Yes, the kit ships complete with the blanking panel, ejector handle, and all required screws and retention clips.
Can I use this blank kit in a full-height drive bay?
No, the 666987-B21 kit is specifically engineered for Small Form Factor (SFF) bays and will not fit full-height slots.
What material is the SFF HDD blank panel made of?
The blank panel is manufactured from high-impact ABS plastic with a reinforced metal backing for durability and EMI shielding.
How does the blanking kit improve server cooling?
By blocking empty bay openings, the kit directs airflow over populated drives and heat-generating components, reducing hotspot formation.
Is the 666987-B21 blank kit hot-swappable?
Yes, it can be installed or removed while the server is powered on without disrupting system operations.
Does installing the blank kit require any software configuration?
No software or firmware changes are needed; the kit functions solely as a mechanical airflow management component.
What are the dimensions of the SFF HDD blank kit?
The kit measures 101.6 mm (W) × 25.4 mm (H) × 203.2 mm (D), matching standard SFF drive bay specifications.
Is the 666987-B21 kit compatible with both SAS and SATA backplanes?
Yes, it fits any standard SFF SAS or SATA backplane without impacting signal integrity.
What warranty does the HP blanking kit carry?
The kit is covered by HP’s standard one-year limited parts warranty and eligible for support under an active HP Care Pack.
Can I return the blank kit if it remains unused?
Yes, unused and unopened kits may be returned within 30 days for a full refund in accordance with HP’s return policy.
Where can I purchase the 666987-B21 SFF HDD blank kit?
You can buy the kit through authorized HP resellers, the official HP online store, or HP’s certified distribution partners.
Does using the blank kit affect my server’s airflow monitoring?
No, the blank panel has no sensors and will not interfere with the server’s built-in airflow or thermal monitoring systems.