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HP 491191-B21 Smart Array SATA SAS 256MB PCIe x8 Raid Controller
- PCIe x8 Interface
- Supports SATA and SAS Drives
- 256MB Cache Memory
- RAID Controller
- Advanced Data Protection Features
- High-Performance Storage Connectivity
- Hot-Plug Drive Support
- Designed for HP ProLiant Servers
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Product Overview
The HP 491191-B21 is a Smart Array controller, specifically a PCIe x8 RAID controller with 256MB cache, supporting both SATA and SAS drives. It provides advanced storage management and data protection capabilities for HP servers.
Technical Information
| Product Type | RAID Controller Card |
| Interface | PCI Express (PCIe) x8 |
| Drive Support | SATA, SAS |
| Cache Memory | 256MB |
Additional Specifications
| RAID Levels Supported | 0, 1, 1+0, 5, 5+0 |
| Brand | HP |
| Model | Smart Array |
Product Description
The HP 491191-B21 is a high-performance RAID controller designed to enhance the storage capabilities of HP ProLiant servers. Featuring a PCIe x8 interface, it offers a robust connection for managing multiple hard drives, ensuring high throughput and low latency for demanding storage applications. This controller supports both SATA and SAS (Serial Attached SCSI) drives, providing flexibility in choosing storage media based on performance and cost requirements. SAS drives are generally preferred for their higher performance and reliability in enterprise environments, while SATA drives offer a more cost-effective solution for bulk storage. The controller's ability to manage both types allows for versatile storage configurations. With 256MB of cache memory, the 491191-B21 accelerates read and write operations, significantly improving overall storage performance. It supports various RAID levels (such as RAID 0, 1, 1+0, 5, and 5+0), enabling data redundancy and fault tolerance. This protects against data loss in the event of a drive failure and can improve performance through techniques like striping. The controller is a critical component for ensuring data integrity and availability in server environments.
