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Drive cage kit allowed easy expansion of LFF storage.
726547-B21
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HPE ML350 Gen9 8LFF Hot Plug Drive Cage Kit
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726547-B21
- Description:
- HPE ML350 Gen9 8LFF Hot Plug Drive Cage Kit
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- Hpe
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726547-B21 Overview
726547-B21 is a high-performance HDD engineered as a 3.5-inch drive featuring a reliable SATA III interface and a robust 7200 RPM spindle speed. It delivers a massive 10 TB storage capacity paired with a 256 MB cache, and is designed to withstand intensive workloads with an annual rating of 550 TB/yr. This enterprise-class hard drive boasts advanced features such as helium-sealed construction, built-in vibration protection, and dual actuator technology, making it ideal for environments that demand both durability and performance.
726547-B21 is optimized for critical applications found in data centers, enterprise servers, high-end NAS systems, and surveillance setups. With a rated MTBF in the millions of hours and efficient power consumption during both active read/write operations and idle periods, this HDD is purpose-built for heavy-duty usage in desktop, server, NAS, and surveillance scenarios, ensuring consistent reliability and efficiency around the clock.
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726547-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
- 10 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
- 550 TB/yr
- Power Consumption (Read/Write)
- 9 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
- 5–55°C
- Product Name
- 726547-B21 Enterprise HDD
- Height
- 1.03 inches
- Width
- 5.79 inches
- Depth
- 8.26 inches
- Weight
- 1.85 lbs
Quality Certifications
To get the detailed certification, please go to the Compliance Center.
Product Comparison Table 
| 726547-B21 |  826690-B21 |  J9F44A |  867974-B21 |  J9F47A | |
|---|---|---|---|---|---|
| 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 / Enterprise Storage | Desktop / Server / NAS / Surveillance |
| 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 | 10 TB | 4 TB | 4 TB | 4 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 210 MB/s |
| Annual Workload Rating | 550 TB/yr | 550 TB/yr | 180 TB/yr | 180 TB/yr | 550 TB/yr |
| Power Consumption (Read/Write) | 9 Watts | 8 Watts | 8 Watts | 8.5 Watts | 8 Watts |
| Power Consumption (Idle) | 5 Watts | 5 Watts | 5 Watts | 5 Watts | 4 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 | No | 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 | 726547-B21 Enterprise HDD | 826690-B21 | J9F44A High-Performance Enterprise HDD | 867974-B21 High Performance HDD | J9F47A High Performance HDD |
| Height | 1.03 inches | 1.03 inches | 1.03 inches | 1.02 inches | 1.0 inches |
| Width | 5.79 inches | 5.79 inches | 5.79 inches | 5.79 inches | 5.8 inches |
| Depth | 8.26 inches | 4.00 inches | 4.00 inches | 4.0 inches | 8.1 inches |
| Weight | 1.85 lbs | 1.85 lbs | 1.8 lbs | 2.0 lbs | 1.2 lbs |
Reviews & Ratings
N
Nicolo Bernardi
4
Solid construction and perfect fit.
R
Rachel Green
5
OEM part worked flawlessly.
P
Per Nilsson
5
Good airflow and stability.
H
Hugo Silva
4
Very satisfied with this upgrade.
Questions & Answers
What is the HPE ML350 Gen9 8LFF Hot Plug Drive Cage Kit?
The HPE ML350 Gen9 8LFF Hot Plug Drive Cage Kit (SKU 726547-B21) is an eight-bay large form factor chassis adapter designed to house and hot-swap 3.5" SAS or SATA drives in an ML350 Gen9 tower or rack server.
Which drive types are supported by this drive cage kit?
This HPE ML350 Gen9 8LFF Hot Plug Drive Cage Kit supports both 12 Gb/s SAS and 6 Gb/s SATA 3.5" drives, ensuring compatibility with enterprise HDDs and SSDs.
How many drives can the 8LFF Hot Plug Drive Cage Kit accommodate?
The kit accommodates up to eight large form factor (3.5") hot-plug drives, maximizing storage density in the ML350 Gen9 chassis.
Is the HPE ML350 Gen9 8LFF drive cage backward compatible?
No. The 8LFF Hot Plug Drive Cage Kit is designed specifically for HPE ProLiant ML350 Gen9 servers and is not backward compatible with earlier Gen8 or Gen7 models.
Which HPE ProLiant servers are compatible with this kit?
The kit is compatible with HPE ProLiant ML350 Gen9 models in both tower and rack configurations; it is not supported in other ProLiant series.
What components are included in the 726547-B21 kit?
The HPE ML350 Gen9 8LFF kit includes the drive cage assembly, drive carriers, mounting brackets, cables, screws, and a quick install guide.
How do I install the 8LFF Hot Plug Drive Cage Kit?
To install, power down the ML350 Gen9 server, remove the existing bezel, slide in the 8LFF cage, secure brackets, connect the SAS backplane cables, and power up following the Quick Install Guide.
Does the kit support hot-swapping of drives?
Yes. The HPE ML350 Gen9 8LFF Hot Plug Drive Cage Kit enables hot-swap functionality for all eight drives, allowing replacement or addition without server downtime.
Can I mix SAS and SATA drives in the same cage?
Yes. The drive cage supports mixing 3.5" SAS and SATA drives in any bay, provided your RAID controller or HBA supports both protocols.
Is a dedicated RAID controller required for this kit?
While not required for basic passthrough, HPE recommends using a Smart Array RAID controller to fully leverage performance, redundancy, and hot-swap features.
What are the physical dimensions of this drive cage?
The HPE ML350 Gen9 8LFF cage measures approximately 8.5" W x 6.3" H x 4.5" D, fitting seamlessly into the ML350 Gen9 drive bay area.
Where can I find the installation guide and software drivers?
You can download the Quick Install Guide, user manual, and firmware/drivers from HPE’s official support website by searching part number 726547-B21.
What warranty coverage does HPE provide for this drive cage kit?
The HPE ML350 Gen9 8LFF kit carries HPE’s standard one-year limited warranty, extendable via HPE Care Pack services for up to five years of support.
How does this 8LFF drive cage improve storage capacity?
By supporting eight 3.5" enterprise drives, the cage increases raw storage density by up to 60% compared to 4LFF configurations, optimizing capacity per chassis.
How can I troubleshoot drive recognition issues in the 8LFF cage?
Verify backplane cable connections, update the server BIOS and SAS controller firmware, reseat drives, and check Smart Array logs for error codes to isolate issues.
What is the correct SKU and part number for ordering?
Order the HPE ML350 Gen9 8LFF Hot Plug Drive Cage Kit using SKU/part number 726547-B21 to ensure compatibility with your Gen9 server.