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Spare SSD integrated cleanly and delivered consistent performance.
Q8E91A
HPE NS CS 300GB Spare SSD
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Q8E91A
HPE NS CS 300GB Spare SSD
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Q8E91A is a high-performance SAN storage system engineered for enterprise data centers and SMB backup needs. It features 24 drive bays that support a mixed configuration of SATA HDD, SAS HDD, SATA SSD, and NVMe SSD drive types, delivering a total storage capacity of 512 TB with RAID 0, RAID 1, RAID 5, RAID 6, and RAID 10 options for robust data protection in virtualization and media server environments.
Q8E91A is powered by an Intel Xeon processor with 8 cores and comes pre-installed with 16 GB of ECC DDR4 memory, expandable up to 128 GB. It includes multiple interfaces such as USB 3.1, Ethernet 10GbE, and Fibre Channel network support, with expansion support for increased scalability. The system is equipped with redundant power supplies rated at 500W and active cooling to ensure continuous operation and reliability for enterprise data centers.
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In a financial services firm running 24/7 transaction processing on HPE ProLiant DL380 Gen10 servers, the Q8E91A-HPE NS CS 300GB Spare SSD is provisioned as a hot spare in RAID-10 arrays. Upon a primary drive failure, the system automatically auto-rebuilds onto the spare in under five minutes, ensuring continuous operations with 99.99% uptime and safeguarding revenue-critical workloads.
In a large-scale VMware Horizon VDI deployment on HPE NS CS clusters, the Q8E91A-HPE NS CS 300GB Spare SSD serves as an on-demand replacement during peak login storms. When an active SSD degrades under heavy concurrency, the hot spare engages instantly to maintain linear IOPS scaling, reducing login latency by 20% and upholding SLA compliance for over 1,000 virtual desktops.
In an AI research lab leveraging HPE Apollo servers for deep learning, the Q8E91A-HPE NS CS 300GB Spare SSD is configured as a failover scratch disk. During intensive TensorFlow data-loading bursts, any degraded SSD is replaced in real time by the spare, sustaining 1.5 GB/s I/O throughput, accelerating model training convergence by 30%, and preventing workflow interruptions.
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 Q8E91A |  Q8B68A |  Q8D76A |  Q8D59A |  Q8F15A | |
|---|---|---|---|---|---|
| Product Type | Storage System | Storage System | Storage System | Storage System | Storage System |
| Storage Type | SAN | SAN | SAN | NAS | SAN |
| Form Factor | Rackmount | Rackmount | Rackmount | Desktop | Rackmount |
| Bay Count | 24-bay | 12-bay | 12-bay | 8-bay | 8-bay |
| Supported Drive Types | Mixed | Mixed | Mixed | Mixed | Mixed |
| Hot-Swap Support | Yes | Yes | Yes | Yes | Yes |
| Max Supported Capacity | 512 TB | 1 PB | 256 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 50 / RAID 60 / JBOD | RAID 0 / RAID 1 / RAID 5 / RAID 6 | 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 |
| 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 | 8 GB |
| Max RAM Capacity | 128 GB | 128 GB | 64 GB | 64 GB | 64 GB |
| RAM Type | ECC DDR4 | ECC DDR4 | ECC DDR4 | ECC DDR4 | ECC DDR4 |
| Network Ports | 10GbE | 10GbE | 10GbE | 10GbE | 10GbE |
| LAN Ports | 4 | 4 | 2 | 4 | 4 |
| USB Ports | USB 3.1 | 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 | Redundant Fan |
| Power Supply | Redundant | Redundant | Redundant | Redundant | Redundant |
| Power Supply Wattage | 500W | 750W | 350W | 500W | 350W |
| 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 | Yes | Yes | No |
| Use Case | SMB / Enterprise Data Center / Virtualization / Media Server | SMB, Enterprise Data Center, Virtualization, Media Server | SMB / Enterprise Data Center / Virtualization / Media Server | Enterprise Data Center | Enterprise Data Center |
| Product Name | Q8E91A Enterprise SAN Storage | Q8B68A Enterprise Storage Array | Q8D76A Enterprise SAN Storage | Q8D59A UltraNAS Pro | Q8F15A Enterprise SAN Storage System |
| Height | 3.5 inches | 3 inches | 3 inches | 3.5 inches | 4.5 inches |
| Width | 17.3 inches | 17.5 inches | 17 inches | 17 inches | 17.3 inches |
| Depth | 27.5 inches | 27.5 inches | 28 inches | 15 inches | 20 inches |
| Weight | 45 lbs | 45 lbs | 35 lbs | 30 lbs | 25 lbs |
Spare SSD integrated cleanly and delivered consistent performance.
Reliable replacement drive for cache and metadata tiers.
No rebuild issues after installation.
Predictable latency and stable operation.
Worked immediately without configuration changes.
The HPE NS CS 300GB Spare SSD (Q8E91A) is a factory-qualified solid-state drive designed as a drop-in replacement for HPE store servers, offering 300 GB of high-performance flash storage.
The HPE NS CS 300GB Spare SSD is compatible with HPE ProLiant Gen9 and Gen10 store and scale-out servers that accept 2.5-inch SAS SSD modules.
The HPE NS CS 300GB Spare SSD uses a 12 Gb/s SAS interface to deliver low latency and high throughput in enterprise storage environments.
Yes, the HPE NS CS 300GB Spare SSD is fully hot-swappable, allowing you to replace failed drives without powering down the server or disrupting operations.