Dell PERC H840 RAID Controller Card – 12Gb/s SAS, 8GB NV Cache, PCIe 3.1, External
The Dell PERC H840 is a high-performance external hardware RAID controller designed for Dell PowerEdge server and external storage environments. It provides 12Gb/s SAS connectivity, PCIe 3.1 host connectivity, 8GB of non-volatile cache, and support for multiple enterprise RAID levels.
The PERC H840 is designed for connecting compatible external SAS storage enclosures and supports Dell-qualified SAS and SATA storage environments according to platform and enclosure compatibility. Its flash-backed cache helps protect cached data during power-loss conditions while supporting performance-focused storage configurations.
Dell PERC H840 Technical Specifications
| Specification |
Details |
| Brand |
Dell |
| Model |
PERC H840 |
| Product Type |
External Hardware RAID Controller |
| Controller Family |
Dell PERC 10 Series |
| Host Interface |
PCIe 3.1 |
| SAS Interface |
12Gb/s SAS |
| SATA Support |
6Gb/s SATA |
| SAS Ports |
2 x 4-lane external SAS connections |
| Connector Type |
External HD Mini-SAS SFF-8644 |
| Cache Memory |
8GB NV Cache |
| Cache Protection |
Flash-Backed Cache |
| RAID Levels |
RAID 0, 1, 5, 6, 10, 50, 60 |
| Maximum Drive Support |
Up to 255 drives, subject to platform and enclosure configuration |
| Enclosure Support |
Up to 8 enclosures in single-path configuration or up to 4 in multipath configuration |
| Virtual Disk Strip Size |
64KB, 128KB, 256KB, 512KB, 1MB |
| Hardware XOR Engine |
Yes |
| Hot-Swap Support |
Yes |
| Hot Spare Support |
Dedicated and global hot spares |
| Online Capacity Expansion |
Supported |
| Controller Type |
External storage controller |
Dell PERC H840 RAID Controller Features
12Gb/s SAS External Storage Connectivity
The Dell PERC H840 provides high-speed external SAS connectivity for compatible storage enclosures. Its dual external SAS interfaces are designed for connecting enterprise storage systems and supporting high-bandwidth storage workloads.
8GB Non-Volatile Cache
The controller includes 8GB of non-volatile cache with flash-backed cache protection. This architecture is designed to improve storage performance while helping protect cached write data during power-loss events.
Enterprise Hardware RAID
The PERC H840 supports RAID 0, 1, 5, 6, 10, 50, and 60, providing multiple options for balancing storage capacity, performance, redundancy, and fault tolerance.
External Enclosure Support
The PERC H840 is specifically designed as an external controller. Dell documentation states that it can support up to eight enclosures in a single-path configuration and up to four enclosures in a multipath configuration.
For Dell PowerVault MD14xx environments, the H840 supports redundant paths when both controller ports are connected to the ports of the same enclosure. External connections use HD Mini-SAS SFF-8644 cables.
Applications
- Enterprise external storage systems
- Dell PowerVault storage enclosure connectivity
- Server-attached SAS storage
- RAID-protected enterprise storage
- Data center storage expansion
- High-performance backup and archive storage
- Storage environments requiring RAID 5, 6, 10, 50, or 60
Compatibility
The Dell PERC H840 is intended for compatible Dell PowerEdge and external storage configurations. Dell specifically documents support for compatible PowerVault MD14xx storage enclosures, with MD24xx support dependent on the appropriate controller firmware version.
The H840 is an external controller and should not be confused with internal PERC controllers such as the H740P. Storage enclosure, server model, firmware, cable, and operating-system compatibility should be verified before installation.
Dell PERC H840 Price in Bangladesh
The price of the Dell PERC H840 RAID Controller Card in Bangladesh may vary depending on condition, sourcing, warranty, and availability. Contact Datacom Technologies (BD) for the latest price and procurement assistance.
Why Choose Dell PERC H840?
- 12Gb/s SAS external storage connectivity
- PCIe 3.1 host interface
- 8GB non-volatile cache with flash-backed protection
- Hardware RAID support for RAID 0, 1, 5, 6, 10, 50, and 60
- Supports large-scale external storage configurations
- Compatible with supported Dell PowerVault storage environments
- Designed for enterprise server and data center storage applications
Buy Dell PERC H840 in Bangladesh
For Dell PERC H840 RAID Controller pricing, server compatibility verification, storage enclosure support, and enterprise procurement in Bangladesh, contact Datacom Technologies (BD).
Email: sales@datacom.com.bd
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