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Drive cage expanded storage without downtime.
784586-B21
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HPE ML110 Gen9 8SFF Hot Plug Drv Cge Kit
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Name:
784586-B21
- Description:
- HPE ML110 Gen9 8SFF Hot Plug Drv Cge Kit
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- Hpe
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784586-B21 Overview
784586-B21 is an enclosed cabinet rack designed for secure and efficient equipment housing. This rack offers a tall 42U configuration with a standard 19-inch mounting width and a depth categorized as 800–1000mm, making it ideal for network closets and data centers. It features a vented door design that facilitates optimal airflow and cooling support, combined with integrated cable management to keep wiring organized.
784586-B21 is engineered with robust features including casters with leveling feet for easy mobility and installation, along with a reliable front door locking mechanism for enhanced security. Its solid construction in cold-rolled steel and fixed side panels ensure durability and stability, marking it as a preferred choice for telecom racks, AV equipment, and server hosting environments.
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784586-B21 Specifications
- Product Type
- Rack
- Rack Type
- Enclosed Cabinet
- Mounting Type
- Floor Standing
- Rack Height (U)
- 42U
- Use Case
- Data Center / Networking Closet / AV Rack / Telecom
- Rack Width
- 19-inch
- Rack Depth
- 800–1000mm
- Weight Capacity
- 501–1000 lbs
- Material
- Cold-Rolled Steel
- Door Type
- Vented Door
- Side Panels
- Fixed
- Cable Management
- Included
- Cooling Support
- Passive Ventilation
- Locking Mechanism
- Front Door Lock
- Casters
- Included
- Leveling Feet
- Included
- Rails Included
- Yes
- Expansion Ready
- Yes
- Grounding Kit Included
- Yes
- Color
- Black
- Compliance
- RoHS / UL Listed / CE
- Product Name
- 784586-B21 Enclosed Cabinet Rack
- Height
- 73 inches
- Width
- 24 inches
- Depth
- 38 inches
- Weight
- 350 lbs
784586-B21 Use Case
Seamless Storage Scaling in Data Center Operations
In enterprise data centers, IT teams install the 784586-B21-HPE ML110 Gen9 8SFF Hot Plug Drive Cage Kit to add eight hot-swappable SSD/HDD bays on-the-fly, enabling non-disruptive capacity expansion and optimized RAID configurations for high-density workloads, resulting in 99.99% uptime and streamlined growth planning.
High-Availability Virtualization on HPE ML110 Gen9
Virtualization engineers leverage the 784586-B21-HPE ML110 Gen9 8SFF Hot Plug Drive Cage Kit to perform in-service drive replacements and upgrades without rebooting, ensuring continuous VM performance under heavy I/O loads, reducing planned maintenance windows, and boosting overall infrastructure resilience.
Robust Disaster Recovery and Backup Acceleration
Backup administrators integrate the 784586-B21-HPE ML110 Gen9 8SFF Hot Plug Drive Cage Kit to provision dedicated hot-swap trays for nightly snapshots and offsite replication, accelerating full-system restores by up to 40%, ensuring enterprise-grade data protection, compliance and rapid RTO achievement.
Quality Certifications
To get the detailed certification, please go to the Compliance Center.
Product Comparison Table 
| 784586-B21 |  H6F54A |  775167R-B21 |  P9K48A |  878576-B21 | |
|---|---|---|---|---|---|
| Product Type | Rack | Rack | Rack | Rack | Rack |
| Rack Type | Enclosed Cabinet | Enclosed Cabinet | Enclosed Cabinet | Enclosed Cabinet | Enclosed Cabinet |
| Mounting Type | Floor Standing | Floor Standing | Floor Standing | Floor Standing | Floor Standing |
| Rack Height (U) | 42U | 42U | 42U | 48U | 42U |
| Use Case | Data Center / Networking Closet / AV Rack / Telecom | Data Center / Networking Closet / Telecom | Data Center / Networking Closet / Telecom / AV Rack | Data Center / Networking Closet / AV Rack / Telecom | Data Center / Networking Closet / AV Rack / Telecom |
| Rack Width | 19-inch | 19-inch | 19-inch | 19-inch | 19-inch |
| Rack Depth | 800–1000mm | 600–800mm | 600–800mm | 1000mm+ | 800–1000mm |
| Weight Capacity | 501–1000 lbs | 501–1000 lbs | 2000+ lbs | 2000+ lbs | 501–1000 lbs |
| Material | Cold-Rolled Steel | Steel | Cold-Rolled Steel | Cold-Rolled Steel | Cold-Rolled Steel |
| Door Type | Vented Door | Vented Door | Vented Door | Vented Door | Vented Door |
| Side Panels | Fixed | Tool-less | Removable | Removable | Fixed |
| Cable Management | Included | Included | Tool-less | Included | Included |
| Cooling Support | Passive Ventilation | Passive Ventilation | Passive Ventilation | Passive Ventilation | Passive Ventilation |
| Locking Mechanism | Front Door Lock | Front Door Lock | Front Door Lock | Front Door Lock | Front Door Lock |
| Casters | Included | Included | No | No | Included |
| Leveling Feet | Included | Included | Included | Included | Included |
| Rails Included | Yes | Yes | Yes | Yes | Yes |
| Expansion Ready | Yes | Yes | Yes | Yes | Yes |
| Grounding Kit Included | Yes | Yes | Yes | Yes | Yes |
| Color | Black | Black | Black | Black | Black |
| Compliance | RoHS / UL Listed / CE | UL Listed | UL Listed | UL Listed | UL Listed |
| Product Name | 784586-B21 Enclosed Cabinet Rack | H6F54A Enterprise Enclosed Cabinet | 775167R-B21 Enclosed Cabinet Rack | P9K48A Enclosed Server Cabinet | 878576-B21 Enclosed Server Rack |
| Height | 73 inches | 73.5 inches | 73.5 inches | 84 inches | 87 inches |
| Width | 24 inches | 19 inches | 24 inches | 27 inches | 24 inches |
| Depth | 38 inches | 28 inches | 29 inches | 47 inches | 32 inches |
| Weight | 350 lbs | 850 lbs | 150 lbs | 600 lbs | 450 lbs |
Reviews & Ratings
E
Erik Johansen
5
Hot plug functionality worked perfectly.
M
Matteo Galli
5
OEM cage fit cleanly inside the chassis.
D
Daan Verbeek
5
Solid build and easy installation.
I
Ivan Petrovic
5
Reliable storage expansion kit.
Questions & Answers
What is the HPE 784586-B21 ML110 Gen9 8SFF Hot Plug Drive Cage Kit?
The HPE 784586-B21 is an 8 Small Form Factor hot-plug drive cage kit for ProLiant ML110 Gen9 servers, enabling installation and hot swapping of up to eight 2.5-inch SAS or SATA drives.
Which HPE server models support the 784586-B21 drive cage kit?
This drive cage kit is fully compatible with HPE ProLiant ML110 Gen9 tower servers equipped with the appropriate drive backplane connector.
How many drives can I install with the 8SFF Hot Plug Drive Cage Kit?
You can install up to eight 2.5-inch small form factor SAS or SATA hot-plug drives in the 784586-B21 cage.
What drive types are supported by the 784586-B21 kit?
The kit supports both SAS and SATA 2.5-inch hot-plug drives, including enterprise HDDs and SSDs certified for HPE servers.
Does the 784586-B21 kit include drive carriers and backplane?
Yes, the kit ships with eight drive carriers, mounting hardware and the matching backplane assembly for ML110 Gen9 servers.
Are additional cables or power supplies required for installation?
No extra cables or power supplies are required. The kit uses existing server power and data connectors once mounted in the chassis.
Does the HPE 8SFF drive cage support RAID configurations?
Yes, when paired with a supported RAID controller like the HPE Smart Array P440, you can configure RAID 0, 1, 5, 6, 10, 50 and 60.
How do I install the 784586-B21 drive cage kit?
Power down the server, remove the bezel, slide the cage into the front bay, secure with captive screws, connect the backplane cable, then power on.
Can I mix SAS and SATA drives in the same cage?
Yes, you can mix SAS and SATA drives, though performance defaults to the lowest common interface speed in mixed configurations.
What is the maximum raw storage capacity supported?
With eight 2.5-inch drives, the maximum raw capacity depends on drive size; using 15.36 TB SSDs, you can achieve up to 122.88 TB total.
How does hot-plug capability improve server uptime?
Hot-plug allows you to replace or install drives without powering down, reducing maintenance windows and minimizing service disruptions.
Is the 784586-B21 a genuine HPE spare part?
Yes, part number 784586-B21 is an official HPE spare kit manufactured and supported by Hewlett Packard Enterprise.
What warranty covers the HPE 8SFF Hot Plug Drive Cage Kit?
This kit carries HPE’s standard limited lifetime warranty, matching the warranty of your ProLiant ML110 Gen9 server.
How do I replace an existing drive cage with the 784586-B21 kit?
Power off the server, unbrand the old cage’s screws and cables, slide in the new kit, reconnect cables, then restore power.
Can I use this kit to upgrade from 4SFF to 8SFF configuration?
Yes, the 784586-B21 kit allows you to expand a 4-bay setup to an 8-bay SFF configuration when your chassis supports it.
Where can I purchase the HPE 784586-B21 drive cage kit?
You can order directly from HPE or authorized resellers; check the HPE Parts Store or contact your local HPE sales representative.