HPE Smart Array P840AR 12GB SAS Controller - 848147-001

Interface: SAS

The HPE Smart Array P840AR Internal SAS Controller is equipped with a SAS (Serial Attached SCSI) interface, which is a high-performance, point-to-point serial protocol used to connect storage devices to servers. SAS offers several benefits and is of great importance for users in enterprise environments.

High Speed and Scalability

SAS provides high-speed data transfer rates, allowing for efficient and reliable data storage and retrieval. With its ability to support multiple devices in a daisy-chain configuration, SAS enables scalability, making it suitable for large-scale storage systems. This means that as your storage requirements grow, you can easily expand your storage capacity by adding more SAS drives.

Improved Performance

The use of SAS technology in the HPE Smart Array P840AR Internal SAS Controller significantly improves performance compared to older parallel SCSI interfaces. The serial nature of SAS eliminates the need for device contention, enabling multiple devices to operate simultaneously without causing bottlenecks. This results in faster data transfer speeds and improved overall system performance.

Reliability and Data Integrity

SAS offers advanced error checking and correction capabilities, ensuring the integrity of data transmission. It utilizes a dual-port architecture, allowing for redundant connections to ensure continuous access to data even in the event of a cable or connector failure. Additionally, SAS controllers support hot-swappable drives, allowing for easy replacement and maintenance without system downtime.

Compatibility and Interoperability

SAS controllers are designed to be backward compatible with SATA (Serial ATA) drives, providing users with flexibility in choosing their storage devices. This compatibility allows businesses to leverage their existing SATA drives while gradually transitioning to higher-performance SAS drives as needed. Furthermore, SAS is an industry-standard interface, ensuring interoperability with a wide range of SAS storage devices from various manufacturers.

Ports: 2

The HPE Smart Array P840AR Internal SAS Controller is equipped with two ports, offering users enhanced connectivity options for their storage devices.

Increased Flexibility

The presence of two ports allows for greater flexibility in configuring your storage system. You can connect multiple SAS drives or expanders to each port, enabling you to create various RAID configurations or separate storage pools. This flexibility is particularly useful in environments where data segregation or performance optimization is required.

Improved Fault Tolerance

The dual-port architecture of the HPE Smart Array P840AR Internal SAS Controller provides redundancy and fault tolerance. In the event of a port failure, the controller automatically switches to the alternate port, ensuring continuous access to data without interruption. This improves system reliability and minimizes the risk of data loss or downtime.

Load Balancing

With two ports, the HPE Smart Array P840AR Internal SAS Controller supports load balancing across both ports. Load balancing distributes data traffic evenly between the ports, optimizing performance and preventing any single port from becoming overwhelmed. This feature is particularly beneficial in high-demand environments where multiple devices are accessing the storage system simultaneously.

Expansion Capability

The availability of two ports provides expansion capability for future growth or additional storage requirements. You can easily connect additional storage devices or expanders to the spare port, allowing you to scale your storage system as your business needs evolve. This scalability eliminates the need for a complete infrastructure overhaul and ensures that your investment in the HPE Smart Array P840AR Internal SAS Controller remains future-proof.

Cache: 2GB FBWC

The HPE Smart Array P840AR Internal SAS Controller features a 2GB Flash-Backed Write Cache (FBWC), which offers significant performance benefits and data protection capabilities.

Enhanced Performance

The 2GB FBWC acts as a high-speed buffer between the controller and the storage devices, accelerating read and write operations. By temporarily storing frequently accessed data in the cache, the controller can reduce latency and improve overall system performance. This results in faster data access and reduced response times, especially for applications that require intensive I/O operations.

Data Protection

The FBWC provides an added layer of data protection by preserving data in the cache even in the event of a power loss. The use of flash memory ensures that the cached data remains intact, allowing for seamless recovery once power is restored. This protects against potential data corruption or loss that may occur during unexpected power outages or system failures.

Write Acceleration

The presence of FBWC enables write acceleration, allowing the controller to acknowledge write requests immediately while storing the data in the cache for subsequent writing to disk. This write caching technique improves overall system responsiveness and performance, particularly for write-intensive workloads. It also helps to reduce wear and tear on the storage drives by minimizing unnecessary write operations.

Configurable Options

The HPE Smart Array P840AR Internal SAS Controller offers configurable options for the FBWC, allowing users to adjust cache settings based on their specific requirements. You can modify cache size or enable additional write caching techniques, such as RAID controller caching or SmartSSD Wear Gauge, to further optimize performance and tailor the system to your workload demands.

Part Number: 848147-001

The part number of a product, such as the HPE Smart Array P840AR Internal SAS Controller, serves as a unique identifier that helps users in identifying and procuring the specific model they require.

Accuracy in Ordering

The part number provides accuracy in ordering the desired product, ensuring that you receive the exact model you need. By referencing the part number, you can be confident that you are purchasing the correct version of the HPE Smart Array P840AR Internal SAS Controller with all the specific features and capabilities you require for your storage system.

Compatibility Assurance

Part numbers also play a crucial role in ensuring compatibility with other components or systems. By cross-referencing the part number, you can verify compatibility with your server or other infrastructure elements. This assurance eliminates potential compatibility issues and ensures seamless integration into your existing environment.

Product Documentation and Support

Part numbers are essential for accessing product documentation and support resources. Manufacturers typically provide comprehensive documentation, including user manuals, technical specifications, and troubleshooting guides, specific to each part number. These resources enable users to make the most of their purchase, troubleshoot any issues, and gain a deeper understanding of the product's capabilities.

Warranty and Service

Part numbers are also associated with warranty and service agreements. By providing the part number during warranty claims or service requests, you can expedite the process and ensure that you receive the appropriate support for your specific product version. This helps to minimize downtime and maximize the lifespan of your HPE Smart Array P840AR Internal SAS Controller.