United States$5,000,000+
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D
David Lawson
4
Controller replacement was straightforward and system stayed stable.
Q8F73A
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HPE NS CS300 Spare Controller
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Q8F73A
- Description:
- HPE NS CS300 Spare Controller
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Q8F73A Overview
Q8F73A is a NAS that incorporates a 16-bay design supporting SATA HDD, SAS HDD, SATA SSD, and NVMe SSD drive types with a total storage capacity of up to 256 TB. It delivers robust RAID configurations including RAID 0, RAID 1, RAID 5, RAID 6, RAID 10, RAID 50, RAID 60, and JBOD, ensuring dependable data protection and redundancy.
Q8F73A is powered by an Intel Xeon processor with 8 cores and comes pre-installed with 16 GB of DDR4 memory, expandable up to 64 GB. The system provides versatile connectivity via USB 3.2, Ethernet 10GbE, and Fibre Channel interfaces and is engineered for high-performance use cases such as SMB backup, enterprise data centers, virtualization, and media servers. It also features expansion support, a redundant power supply with a 250W wattage rating, active cooling, and overall system redundancy.
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Q8F73A Specifications
- Product Type
- Storage System
- Storage Type
- NAS
- Form Factor
- Rackmount
- Bay Count
- 16-bay
- Supported Drive Types
- SATA HDD / SAS HDD / SATA SSD / NVMe SSD
- Hot-Swap Support
- Yes
- Max Supported Capacity
- 256 TB
- RAID Support
- RAID 0 / RAID 1 / RAID 5 / RAID 6 / RAID 10 / RAID 50 / RAID 60 / JBOD
- 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
- Active
- Power Supply
- Redundant
- Power Supply Wattage
- 250W
- Operating System
- Custom OS
- Snapshot Support
- Yes
- Cloud Sync Support
- Yes
- Virtualization Ready
- Yes
- iSCSI Support
- Yes
- Surveillance Support
- No
- Use Case
- SMB / Enterprise Data Center / Virtualization / Media Server
- Product Name
- Q8F73A Storage Appliance
- Height
- 3.5 inches
- Width
- 17.3 inches
- Depth
- 28.7 inches
- Weight
- 35 lbs
Q8F73A Use Case
Rapid Failover in Tier-1 Data Centers
In enterprise SAN environments, the Q8F73A-HPE NS CS300 Spare Controller remains pre-staged to automatically assume control if a primary controller fails. This ensures sub-60-second failover, sustains 99.999% availability and protects business continuity with zero manual intervention.
Streamlined Disaster Recovery for Remote Offices
For distributed branch offices, deploying a local Q8F73A-HPE NS CS300 Spare Controller enables immediate hardware replacement upon controller failure, bypassing multi-day shipping delays. Organizations achieve RTOs under two hours, maintain regulatory compliance and minimize productivity loss.
Performance Continuity for Virtualized Workloads
In VDI and server virtualization clusters, the Q8F73A-HPE NS CS300 Spare Controller supports hot-swap replacement without service disruption, preserving peak IOPS under heavy VM consolidation. This approach delivers consistent performance SLAs, optimizes resource utilization and reduces maintenance windows.
Quality Certifications
To get the detailed certification, please go to the Compliance Center.
Product Comparison Table 
| Q8F73A |  Q8D35A |  Q8B79A |  Q8B70A |  Q8B71A | |
|---|---|---|---|---|---|
| Product Type | Storage System | Storage System | Storage System | Storage System | Storage System |
| Storage Type | NAS | SAN | SAN | SAN | SAN |
| Form Factor | Rackmount | Rackmount | Rackmount | Rackmount | Rackmount |
| Bay Count | 16-bay | 24-bay | 8-bay | 8-bay | 16-bay |
| Supported Drive Types | SATA HDD / SAS HDD / SATA SSD / NVMe SSD | Mixed | SATA HDD / SAS HDD / SATA SSD / NVMe SSD | Mixed | Mixed |
| Hot-Swap Support | Yes | Yes | Yes | Yes | Yes |
| Max Supported Capacity | 256 TB | 1 PB | 512 TB | 512 TB | 256 TB |
| RAID Support | RAID 0 / RAID 1 / RAID 5 / RAID 6 / RAID 10 / RAID 50 / RAID 60 / JBOD | 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 | 16 GB | 16 GB |
| Max RAM Capacity | 64 GB | 128 GB | 64 GB | 32 GB | 64 GB |
| RAM Type | DDR4 | ECC DDR4 | ECC DDR4 | ECC DDR4 | ECC DDR4 |
| Network Ports | 10GbE | 10GbE | 10GbE | 10GbE | 10GbE |
| LAN Ports | 4 | 4 | 4 | 4 | 4 |
| USB Ports | USB 3.2 | USB 3.2 | USB 3.0 | USB 3.2 | USB 3.2 |
| Expansion Support | Yes | Yes | Yes | Yes | Yes |
| Cooling | Active | Redundant Fan | Active | Redundant Fan | Active |
| Power Supply | Redundant | Redundant | Redundant | Redundant | Redundant |
| Power Supply Wattage | 250W | 750W | 350W | 350W | 500W |
| Operating System | Custom OS | Custom OS | Custom OS | 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 | No | No | No |
| Use Case | SMB / Enterprise Data Center / Virtualization / Media Server | Enterprise Data Center | Enterprise Data Center | Enterprise Data Center | Enterprise Data Center |
| Product Name | Q8F73A Storage Appliance | Q8D35A Enterprise Storage Array | Q8B79A Enterprise SAN Storage System | Q8B70A Storage Appliance | Q8B71A Enterprise Storage System |
| Height | 3.5 inches | 3.5 inches | 3 inches | 3.5 inches | 3.5 inches |
| Width | 17.3 inches | 17.5 inches | 17 inches | 17.5 inches | 17.2 inches |
| Depth | 28.7 inches | 28.0 inches | 28 inches | 27 inches | 25.0 inches |
| Weight | 35 lbs | 45 lbs | 45 lbs | 25 lbs | 45 lbs |
Reviews & Ratings
E
Eric Wallace
4
Reliable spare controller for business critical storage.
C
Christopher Allen
5
No issues after deployment in production.
B
Brian Hughes
5
Met expectations for enterprise reliability.
S
Steven Parker
5
Good experience with quick recovery time.
Questions & Answers
What is the HPE NS CS300 Spare Controller (SKU: Q8F73A)?
The HPE NS CS300 Spare Controller (Q8F73A) is a factory-qualified failover controller module for HPE CS300 storage arrays, designed to restore redundancy and performance after a controller failure.
Which storage systems are compatible with the Q8F73A controller?
The Q8F73A spare controller is fully compatible with HPE NS CS300 and CS300-S Dual-Controller Storage Systems in all supported firmware releases.
How do I know when my CS300 requires a spare controller replacement?
Your CS300 management console will display a critical controller fault message and degrade I/O performance when a primary or secondary controller fails, indicating the need for a spare replacement.
Is the HPE NS CS300 Spare Controller hot-swappable?
Yes, the Q8F73A controller is hot-swappable and can be replaced without shutting down the storage array or interrupting host access.
What are the key technical specifications of the Q8F73A controller?
The Q8F73A features dual Intel Xeon processors, 16 GB DDR4 ECC memory, two 10 GbE host ports, redundant power inputs, and integrated RAID acceleration.
Does the spare controller come preloaded with firmware?
Yes, each Q8F73A module ships with factory-installed firmware matching the current HPE CS300 release for plug-and-play integration.
Where can I download the latest firmware for the CS300 spare controller?
Visit the HPE Support Center, search your CS300 model, and download the latest firmware package under 'Drivers & Software > Storage Controller Firmware'.
What power and cooling requirements does the CS300 controller have?
The CS300 controller operates on dual 100–240 V AC inputs, draws up to 150 W, and relies on the array’s front-to-back airflow cooling design.
How does replacing a failed controller restore system performance?
Installing the Q8F73A spare immediately re-establishes full controller redundancy, rebalances I/O loads, and eliminates performance bottlenecks caused by degraded mode.
What is the warranty coverage for the HPE NS CS300 Spare Controller?
The Q8F73A is covered by HPE’s one-year limited parts and labor warranty with options to extend via HPE Foundation Care service packs.
Can I use a refurbished Q8F73A spare controller?
HPE strongly recommends using new, factory-certified Q8F73A modules to ensure full warranty compliance and firmware compatibility.
Are there any software prerequisites for installing the spare controller?
Ensure your CS300 is running supported storage controller firmware and that you have administrative access to the HPE Nimble Storage OS management interface.
What is the typical lead time for delivery of a Q8F73A spare controller?
Standard delivery for the Q8F73A is 3–5 business days, subject to stock availability and your location.
What support options are available for the Q8F73A controller?
HPE offers 24x7 telephone support, firmware updates via HPE Support Center, and on-site replacement services through Foundation Care or Proactive Care contracts.
How do I install the HPE NS CS300 Spare Controller step by step?
Power down the failed controller per the CS300 service guide, slide out the faulty module, insert the Q8F73A until it locks, power it on, and verify status in the management console.
How can I verify the spare controller is functioning correctly after installation?
Log in to the HPE Nimble Storage OS GUI, confirm both controllers show ‘Healthy’ status, and run a storage diagnostic scan to validate I/O operations.