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Cache upgrade delivered predictable gains.
Q8D20A
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NS CS235 960GB Cache Fld Upgrade
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Q8D20A
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- NS CS235 960GB Cache Fld Upgrade
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Q8D20A Overview
Q8D20A is a high-performance SAN storage system designed for demanding enterprise applications. It features 8 drive bays that support SATA HDD, SAS HDD, SATA SSD, and NVMe SSD drive types, delivering a total storage capacity of up to 512 TB. The system offers multiple RAID configurations including RAID 0, RAID 1, RAID 5, RAID 6, and RAID 10 to ensure data redundancy and performance optimization.
Q8D20A is powered by an Intel Xeon processor with 8 cores and comes with 16 GB of pre-installed ECC DDR4 memory upgradeable to 128 GB. It is equipped with high-speed interfaces including USB 3.2 and 10GbE network ports, along with 2 LAN ports for versatile connectivity. The device supports expansion, features redundant cooling with a redundant fan, and provides a redundant 750W power supply. Ideal for enterprise data centers and virtualization use cases, Q8D20A delivers reliable performance and robust scalability.
Q8D20A price is is available on request. Get immediate quote.
Request bulk order quote for Q8D20A for additional pricing. Browse the full Hpe Nimble Storage series or explore all Hpe products.
Q8D20A Specifications
- Product Type
- Storage System
- Storage Type
- SAN
- 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
- 128 GB
- RAM Type
- ECC DDR4
- Network Ports
- 10GbE
- LAN Ports
- 2
- USB Ports
- USB 3.2
- Expansion Support
- Yes
- Cooling
- Redundant Fan
- Power Supply
- Redundant
- Power Supply Wattage
- 750W
- 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 / Virtualization
- Product Name
- Q8D20A Enterprise Storage Array
- Height
- 3.5 inches
- Width
- 17 inches
- Depth
- 27 inches
- Weight
- 45 lbs
Q8D20A Use Case
Accelerating Enterprise OLTP Databases in Financial Trading
A global investment bank integrates the Q8D20A-NS CS235 960GB Cache Field Upgrade into its primary OLTP database cluster to absorb high write bursts and deliver sub-millisecond transaction latency. By offloading hot data to the 960GB enterprise cache SSD, the bank achieves a 3× increase in IOPS during peak trading hours and maintains consistent throughput under heavy load. The upgrade ensures real-time price quoting, faster order matching and improved client satisfaction while reducing backend storage contention by 60%.
Optimizing VDI Boot Storms and Application Performance
A Fortune 500 corporation deploys the Q8D20A-NS CS235 960GB Cache Field Upgrade across its HPE ProLiant servers to accelerate Virtual Desktop Infrastructure (VDI) boot storms and on-demand application launches. The high-density 960GB cache layer delivers sustained 250K IOPS, cutting pooled VM boot time by 50% and reducing login delays for 5,000 concurrent users. This results in higher end-user productivity, increased desktop density per server and a measurable reduction in storage TCO.
Enabling Real-Time Big Data Analytics in Healthcare Genomics
A genomics research institute integrates the Q8D20A-NS CS235 960GB Cache Field Upgrade into its Hadoop and Spark clusters to accelerate alignment, variant calling and AI-driven analysis. The low-latency cache tier ingests and serves active datasets with up to 40% faster job completion, enabling researchers to process whole-genome sequences in hours instead of days. This high-impact upgrade optimizes resource utilization, accelerates time-to-insight for precision medicine projects and enhances overall pipeline efficiency.
Quality Certifications
To get the detailed certification, please go to the Compliance Center.
Product Comparison Table 
| Q8D20A |  Q8F72A |  Q8C91A |  Q8D35A |  Q8B64A | |
|---|---|---|---|---|---|
| Product Type | Storage System | Storage System | Storage System | Storage System | Storage System |
| Storage Type | SAN | SAN | NAS | SAN | SAN |
| Form Factor | Rackmount | Rackmount | Rackmount | Rackmount | Rackmount |
| Bay Count | 8-bay | 12-bay | 8-bay | 24-bay | 16-bay |
| Supported Drive Types | SATA HDD / SAS HDD / SATA SSD / NVMe SSD | SATA HDD / SAS HDD / SATA SSD / NVMe SSD | 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 | 1 PB | 256 TB | 1 PB | 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 | 16 GB | 16 GB |
| Max RAM Capacity | 128 GB | 128 GB | 64 GB | 128 GB | 64 GB |
| RAM Type | ECC DDR4 | ECC DDR4 | DDR4 | ECC DDR4 | ECC DDR4 |
| Network Ports | 10GbE | 10GbE | 10GbE | 10GbE | 10GbE / Fibre Channel |
| LAN Ports | 2 | 4 | 4 | 4 | 4 |
| USB Ports | USB 3.2 | USB 3.2 | USB 3.2 | USB 3.2 | USB 3.2 |
| Expansion Support | Yes | Yes | Yes | Yes | Yes |
| Cooling | Redundant Fan | Redundant Fan | Redundant Fan | Redundant Fan | Active |
| Power Supply | Redundant | Redundant | Redundant | Redundant | Redundant |
| Power Supply Wattage | 750W | 750W | 500W | 750W | 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 | Enterprise Data Center / Virtualization | Enterprise Data Center | SMB / Enterprise Data Center / Virtualization / Media Server | Enterprise Data Center | SMB / Enterprise Data Center / Media Server / Virtualization |
| Product Name | Q8D20A Enterprise Storage Array | Q8F72A Enterprise SAN Storage System | Q8C91A Enterprise NAS | Q8D35A Enterprise Storage Array | Q8B64A Enterprise SAN Storage |
| Height | 3.5 inches | 3.5 inches | 3.5 inches | 3.5 inches | 4.5 inches |
| Width | 17 inches | 17.3 inches | 17.3 inches | 17.5 inches | 17.5 inches |
| Depth | 27 inches | 28.0 inches | 20.0 inches | 28.0 inches | 28.0 inches |
| Weight | 45 lbs | 46 lbs | 25 lbs | 45 lbs | 45 lbs |
Reviews & Ratings
S
Saira Noman
5
Easy integration with existing system.
L
Lennart Holm
5
Improved read heavy workloads.
U
Umer Saeed
5
No operational issues.
P
Peter Collins
4
Solid cache enhancement.
Questions & Answers
What is the NS CS235 960GB Cache Fld Upgrade (SKU: Q8D20A)?
The NS CS235 960GB Cache Fld Upgrade (Q8D20A) is a factory-approved flash cache expansion module designed to increase system caching capacity to 960 GB for HPE Nimble Storage CS235 arrays.
Which server models support the Q8D20A cache upgrade?
The Q8D20A upgrade is compatible with HPE Nimble Storage CS235 and CS235d hybrid flash arrays; verify compatibility in the array’s user guide or HPE QuickSpecs.
How does the 960GB cache upgrade improve storage performance?
By boosting cache capacity to 960 GB, the upgrade accelerates read/write operations, reduces I/O latency, and enhances application responsiveness under demanding workloads.
Do I need to power down my array to install the Q8D20A module?
No, the Q8D20A cache module supports hot-swap installation, allowing you to install the upgrade without powering down or disrupting I/O operations.
Is a firmware update required before installing the 960GB cache?
Ensure your CS235 array firmware is at or above the minimum version specified in the release notes; if not, update firmware prior to cache module installation.
What tools are required for installing the cache upgrade?
No specialized tools are required; the Q8D20A module slides into the designated cache slot and locks into place using the built-in retention latch.
Will installing Q8D20A void my existing warranty?
No, installing an HPE factory-approved Q8D20A module maintains your existing warranty and support agreements when performed according to HPE guidelines.
How do I verify the cache upgrade was installed successfully?
Log into the Nimble Storage GUI or CLI and check the System > Hardware > Cache section to confirm the new 960 GB capacity is recognized.
Can I monitor cache performance after installing the upgrade?
Yes, use the Nimble Storage Performance tab to view cache hit rates, I/O latency, and throughput metrics in real time to assess the upgrade benefits.
Does the Q8D20A module support RAID configurations?
Cache modules operate independently of disk RAID; the 960 GB flash cache accelerates all configured RAID volumes without altering RAID settings.
What power and cooling requirements does the cache upgrade have?
The Q8D20A module draws less than 10 W of power and operates within the array’s standard thermal envelope; no additional cooling is required.
Is data protected during the cache upgrade process?
Yes, existing data remains intact as the hot-swap procedure preserves on-disk data and migrates cache contents transparently to ensure data integrity.
How long does the cache upgrade installation take?
The physical installation and system recognition typically take under 10 minutes, with no scheduled downtime required for most environments.
What is the mean time between failures (MTBF) for the Q8D20A module?
The Q8D20A cache module has an MTBF rating exceeding 2 million hours, reflecting enterprise-grade reliability for continuous operation.
Can I return or exchange the cache module if it doesn’t meet my needs?
HPE’s standard return policy applies: you may return or exchange the Q8D20A within 30 days of purchase in original condition with valid proof of purchase.
Where can I find detailed installation instructions for the Q8D20A?
Refer to the HPE Nimble Storage CS235 Installation and Service Guide available on the HPE Support website for step-by-step procedures and safety guidelines.