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Q8D51A
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HPE NS CS420-X4 Cntlr/PS/HDD/SSD Kit
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Q8D51A
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- HPE NS CS420-X4 Cntlr/PS/HDD/SSD Kit
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Q8D51A Overview
Q8D51A is a high-performance NAS solution designed for demanding enterprise environments and SMB backup applications. It features an 8-bay enclosure that supports SATA HDD, SAS HDD, SATA SSD, and NVMe SSD drive types, with a total storage capacity of up to 512 TB and RAID configurations including RAID 0, RAID 1, RAID 5, RAID 6, and RAID 10.
Q8D51A is powered by an Intel Xeon processor with 8 cores and comes with 16 GB of pre-installed DDR4 RAM, expandable up to 64 GB. It offers versatile interfaces such as USB 3.2, 10GbE Ethernet, and Fibre Channel, along with network expansion support, redundant cooling through a redundant fan system, and a redundant power supply rated at 350W – making it ideal for enterprise data centers, virtualization, media servers, and SMB backup use cases.
Q8D51A price is is available on request. Get immediate quote.
Request bulk order quote for Q8D51A for additional pricing. Browse the full Hpe Nimble Storage series or explore all Hpe products.
Q8D51A Specifications
- Product Type
- Storage System
- Storage Type
- NAS
- Form Factor
- Rackmount
- Bay Count
- 8-bay
- Supported Drive Types
- SATA HDD / SAS HDD / SATA SSD / NVMe SSD
- Hot-Swap Support
- Yes
- Max Supported Capacity
- 512 TB
- RAID Support
- RAID 0 / RAID 1 / RAID 5 / RAID 6 / RAID 10
- CPU Type
- Intel Xeon
- CPU Cores
- 8
- Installed RAM
- 16 GB
- Max RAM Capacity
- 64 GB
- RAM Type
- DDR4
- Network Ports
- 10GbE
- LAN Ports
- 4
- USB Ports
- USB 3.2
- Expansion Support
- Yes
- Cooling
- Redundant Fan
- Power Supply
- Redundant
- Power Supply Wattage
- 350W
- Operating System
- Custom OS
- Snapshot Support
- Yes
- Cloud Sync Support
- Yes
- Virtualization Ready
- Yes
- iSCSI Support
- Yes
- Surveillance Support
- No
- Use Case
- Enterprise Data Center
- Product Name
- Q8D51A
- Height
- 1
- Width
- 19
- Depth
- 25
- Weight
- 30 lbs
Q8D51A Use Case
High-Performance Virtualization Consolidation with HPE NS CS420-X4
In a global financial services firm consolidating 1,200 VMware vSphere VMs, the Q8D51A-HPE NS CS420-X4 Kit integrates dual controllers, redundant PSUs and mixed HDD/SSD tiers to deliver sub-millisecond latency and 1.2M IOPS. Outcome: 60% higher VM density, consistent sub-1ms response times under peak loads and 40% reduction in storage footprint, enabling agile expansion and predictable performance SLAs.
Real-Time Analytics Acceleration for Big Data Pipelines
A retail analytics provider deployed the Q8D51A-HPE NS CS420-X4 Kit as the primary storage tier for Spark and Hadoop clusters processing terabytes of POS and web-click data daily. Leveraging SSD caching and adaptive flash algorithms, the solution achieves 4× faster query response, 85% improvement in ETL throughput and real-time dashboard refreshes, driving immediate inventory optimization and personalized marketing campaigns.
Enterprise Backup and Disaster Recovery Target
A multinational manufacturing enterprise integrated the Q8D51A-HPE NS CS420-X4 Kit as a dedicated Veeam backup repository. With built-in dedupe, compression and high-density HDD/SSD mix, daily backup windows shrank from 12 to 4 hours, DR restore time objective (RTO) improved by 70%, and overall storage TCO fell by 30%, ensuring rapid recovery and regulatory compliance.
Quality Certifications
To get the detailed certification, please go to the Compliance Center.
Product Comparison Table 
| Q8D51A |  Q8F02A |  Q8D52A |  Q8B34A |  Q8C96A | |
|---|---|---|---|---|---|
| Product Type | Storage System | Storage System | Storage System | Storage System | Storage System |
| Storage Type | NAS | SAN | SAN | NAS | SAN |
| Form Factor | Rackmount | Rackmount | Rackmount | Rackmount | Rackmount |
| Bay Count | 8-bay | 16-bay | 16-bay | 8-bay | 12-bay |
| Supported Drive Types | SATA HDD / SAS HDD / SATA SSD / NVMe SSD | Mixed | SATA HDD / SAS HDD / SATA SSD / NVMe SSD | Mixed | SATA HDD / SAS HDD / SATA SSD / NVMe SSD |
| Hot-Swap Support | Yes | Yes | Yes | Yes | Yes |
| Max Supported Capacity | 512 TB | 512 TB | 512 TB | 512 TB | 512 TB |
| RAID Support | RAID 0 / RAID 1 / RAID 5 / RAID 6 / RAID 10 | RAID 0 / RAID 1 / RAID 5 / RAID 6 / RAID 10 | RAID 0 / RAID 1 / RAID 5 / RAID 6 / RAID 10 | RAID 0 / RAID 1 / RAID 5 / RAID 6 / RAID 10 | RAID 0 / RAID 1 / RAID 5 / RAID 6 / RAID 10 |
| CPU Type | Intel Xeon | Intel Xeon | Intel Xeon | Intel Xeon | Intel Xeon |
| CPU Cores | 8 | 8 | 8 | 8 | 8 |
| Installed RAM | 16 GB | 16 GB | 16 GB | 8 GB | 16 GB |
| Max RAM Capacity | 64 GB | 128 GB | 64 GB | 32 GB | 128 GB |
| RAM Type | DDR4 | ECC DDR4 | ECC DDR4 | ECC DDR4 | ECC DDR4 |
| Network Ports | 10GbE | 10GbE | 10GbE | 10GbE | 10GbE / Fibre Channel |
| LAN Ports | 4 | 4 | 2 | 4 | 2 |
| USB Ports | USB 3.2 | USB 3.0 | USB 3.2 | USB 3.2 | USB 3.2 |
| Expansion Support | Yes | Yes | Yes | Yes | Yes |
| Cooling | Redundant Fan | Redundant Fan | Redundant Fan | Active | Redundant Fan |
| Power Supply | Redundant | Redundant | Redundant | Redundant | Redundant |
| Power Supply Wattage | 350W | 500W | 350W | 500W | 350W |
| Operating System | Custom OS | Custom OS | N/A | Custom OS | Custom OS |
| Snapshot Support | Yes | Yes | Yes | Yes | Yes |
| Cloud Sync Support | Yes | Yes | Yes | Yes | Yes |
| Virtualization Ready | Yes | Yes | Yes | Yes | Yes |
| iSCSI Support | Yes | Yes | Yes | Yes | Yes |
| Surveillance Support | No | No | N/A | No | Yes |
| Use Case | Enterprise Data Center | Enterprise Data Center | SMB / Enterprise Data Center / Virtualization / Media Server | Enterprise Data Center | SMB / Enterprise Data Center / Media Server / Virtualization |
| Product Name | Q8D51A | Q8F02A Enterprise Storage System | Q8D52A Enterprise Storage System | Q8B34A Storage Gateway | Q8C96A Enterprise Storage System |
| Height | 1 | 3.5 inches | N/A | 3.5 inches | 3.5 inches |
| Width | 19 | 17.3 inches | N/A | 17.5 inches | 17.3 inches |
| Depth | 25 | 25.0 inches | N/A | 27.5 inches | 25.0 inches |
| Weight | 30 lbs | 52 lbs | N/A | 25 lbs | 35 lbs |
Reviews & Ratings
W
Wesley Norton
5
No compatibility issues during replacement.
P
Patrick Ellison
4
Solid build quality and reliable operation in production.
N
Noah Whitaker
5
Good spare solution for business-critical storage.
D
Derek Sullivan
5
Worked as expected after installation.
Questions & Answers
What is the HPE NS CS420-X4 Controller/PS/HDD/SSD Kit (SKU Q8D51A)?
The HPE NS CS420-X4 Kit (SKU Q8D51A) is a modular storage expansion solution that integrates a controller, redundant power supplies, HDD bays and SSD bays for HPE servers.
What components are included in the Q8D51A kit?
The kit includes an HPE CS420-X4 storage controller, two hot-plug power supplies, four 3.5" HDD drive bays, four 2.5" SSD drive bays, and installation brackets.
Which HPE servers are compatible with the CS420-X4 kit?
The CS420-X4 kit is compatible with HPE ProLiant DL360, DL380, DL385, DL560 and DL580 Gen10 servers with an available PCIe slot and drive bay support.
How much storage capacity does the CS420-X4 kit support?
The kit supports up to four 3.5" HDDs (maximum 96 TB) and four 2.5" SSDs (maximum 30.72 TB), for a combined raw capacity of up to 126.72 TB.
What drive types are supported by the CS420-X4 kit?
The CS420-X4 kit supports 12 Gb/s SAS HDDs (7.2K, 10K, 15K RPM) and 6 Gb/s SATA/SAS SSDs (SLC, MLC, TLC) in 3.5" and 2.5" form factors.
Does the kit include redundant power supplies?
Yes, the Q8D51A kit includes two hot-plug, redundant 500 W power supplies for high availability and failover protection.
Is the CS420-X4 controller hot-swappable?
Yes, both the controller and all drive bays in the CS420-X4 kit support hot-swap operations without server downtime.
What interface and data transfer rates does the controller support?
The CS420-X4 controller uses a PCIe 3.0 x8 interface and supports up to 12 Gb/s SAS and 6 Gb/s SATA data transfer rates per port.
Can I install both HDDs and SSDs simultaneously?
Yes, the CS420-X4 kit allows mixed HDD and SSD configurations in its four 3.5" and four 2.5" bays for tiered storage.
How do I install the CS420-X4 kit in my HPE server?
Power down the server, insert the CS420-X4 module into an available drive bay, secure the brackets, connect the power and SAS cables, then power on and configure in HPE Smart Storage Administrator.
How can I manage and monitor the CS420-X4 controller?
Use HPE Smart Storage Administrator (SSA) or HPE OneView to configure RAID, monitor drive health, view performance metrics and apply firmware updates.
What firmware updates are available for the CS420-X4 kit?
HPE regularly provides firmware and driver updates via the HPE Support Center to enhance performance, compatibility and security for the CS420-X4 controller.
What are the physical dimensions and weight of the kit?
The CS420-X4 kit measures 87 mm H x 482 mm W x 680 mm D and weighs approximately 14 kg fully populated.
What is the typical power consumption of the CS420-X4 kit?
Under nominal load, the kit consumes 150 W; maximum power draw is 600 W with all drives active and controller at peak load.
Is the kit covered by HPE warranty and support?
Yes, Q8D51A is covered by HPE’s standard 3-year parts, labor and on-site warranty with optional Proactive Care and Foundation Care support upgrades.
Can I expand storage capacity in the future?
Yes, you can upgrade drive capacities or add additional CS420-X4 kits in available server bays to scale storage as needed.