HPE Smart Array E208E-P SR GEN10 Ctrlr - 804398-B21

HPE 804398-B21 Smart Array E208E-P SR Gen10 PCIe RAID Controller

Overview

The HPE Smart Array E208E-P SR Gen10 (804398-B21) is an external PCIe plug-in RAID controller built for HPE Gen10 server platforms that need to manage high-density SAS and SATA storage arrays outside the chassis. With two x4 external Mini-SAS HD ports running at 12Gb/s, it bridges internal server resources to external JBOD enclosures, tape libraries, or shared storage shelves — the kind of connectivity that shows up in NVR-dense video surveillance back-ends, evidence archive servers, and high-availability storage nodes where the drives live in a separate enclosure and the controller is the traffic cop.

The 804398-B21 (often searched as 804398 B21) slots into a PCIe 3.0 x8 slot, delivering up to 1,200 MB/s of controller bandwidth per lane. For deployments running 24/7 continuous write streams from multi-camera VMS platforms, that headroom prevents the storage subsystem from becoming the bottleneck at scale.

Key Features

• 12Gb/s SAS / 6Gb/s SATA dual-protocol support: Running SAS at 12Gb/s means your high-performance drive arrays — SSDs or enterprise SAS HDDs — aren't artificially throttled by the controller. SATA at 6Gb/s keeps compatibility with lower-cost nearline drives when cost-per-terabyte matters more than peak throughput. You pick the drive tier; the controller doesn't force the decision.
• Two x4 external Mini-SAS HD ports: Connecting directly to external drive enclosures without consuming internal backplane bandwidth is the core use case here. A single 804398-B21 can fan out across multiple JBODs, making it the right pick when storage physically needs to live outside the compute chassis — common in rack-dense surveillance and archival environments.
• 8 SAS lanes: Eight lanes of SAS connectivity means you can address multiple drives simultaneously without queuing traffic at the controller. In sequential write workloads — video surveillance being the textbook example — parallel lane access keeps write latency predictable.
• PCIe 3.0 x8 host interface: PCIe 3.0 x8 provides roughly 64 Gbps of theoretical host-side bandwidth, which is more than enough to prevent the PCIe slot from being the bottleneck ahead of the SAS lanes themselves. This matters when you're saturating multiple drive enclosures at once.
• RAID 0, 1, 5, and 10: The four included RAID levels cover the practical range for surveillance storage: RAID 5 for capacity-efficient redundancy across multiple drives, RAID 10 for performance-critical pools where drive rebuild time risk is unacceptable, RAID 0 for scratch or non-critical streams, and RAID 1 for simple mirrored redundancy on metadata or OS volumes.
• Up to 238 physical drives: Supporting 238 physical drives per controller means a single 804398-B21 can manage a fully populated multi-shelf JBOD environment without daisy-chaining multiple controllers and multiplying your management surface. Large evidence retention archives or deep storage tiers in enterprise VMS deployments can grow into this headroom without replacing the controller.
• Up to 64 logical drives: 64 logical drive targets give administrators flexibility to segment storage pools by camera group, retention tier, or tenant in multi-tenant deployments — without needing multiple controllers to maintain logical separation.
• PCIe plug-in form factor: The controller installs in a standard PCIe slot with no proprietary bracket or riser required beyond what HPE Gen10 platforms already accommodate, keeping the installation straightforward for integrators already familiar with Gen10 server hardware.

Integration & Compatibility

The E208E-P SR Gen10 is designed for HPE ProLiant Gen10 server platforms. It is validated against HPE's Smart Array ecosystem, which means it works within HPE's storage management utilities for monitoring drive health, configuring logical volumes, and managing spare assignments. For video surveillance back-end deployments, this controller pairs naturally with network video recorders and high-density storage expansion shelves where an external SAS connection is required. Integrators building out HPE-based storage infrastructure can reference the broader HPE server and storage catalog for compatible enclosures and expansion options.

When specifying storage for surveillance workloads, the choice of RAID controller directly affects write endurance and rebuild time planning. Pairing the 804398-B21 with a storage capacity and retention planning guide helps size the drive count and RAID level against your camera count and retention window before commissioning the system. For the server chassis side, ensure the target Gen10 platform has a free PCIe 3.0 x8 (or wider) slot — x4 slots will not seat this controller at full electrical width.

Frequently Asked Questions

Q: What RAID levels does the HPE 804398-B21 support?

A: The 804398-B21 supports RAID 0, 1, 5, and 10. RAID 5 is commonly used for capacity-efficient surveillance storage with single-drive fault tolerance; RAID 10 suits higher-performance or higher-availability pools where rebuild risk needs to be minimized.

Q: How many physical drives can the 804398-B21 manage?

A: The controller supports up to 238 physical drives, making it suitable for large multi-shelf external JBOD environments without requiring additional controllers.

Q: Does the 804398-B21 use internal or external ports?

A: This is an external controller — it has two x4 Mini-SAS HD external ports and no internal backplane connectors. It is designed specifically to connect to external drive enclosures outside the server chassis.

Q: What is the SAS interface speed on the 804398-B21?

A: SAS runs at 12Gb/s per lane; SATA devices connected through SAS expanders operate at 6Gb/s. The PCIe 3.0 x8 host interface delivers up to 1,200 MB/s of controller bandwidth per lane.

Q: What is the warranty on the HPE 804398-B21?

A: The 804398-B21 carries a 3-year parts-only manufacturer warranty.

Q: Which server generation is the 804398-B21 compatible with?

A: The E208E-P SR is validated for HPE ProLiant Gen10 server platforms. Verify slot availability (PCIe 3.0 x8 or wider) in your specific chassis before ordering.

Ted Perry

When I spec storage controllers for multi-camera surveillance back-ends, the first question I ask is whether the drives need to live outside the compute chassis — and if the answer is yes, the 804398-B21 becomes the natural starting point for HPE Gen10 platforms. Two x4 external Mini-SAS HD ports at 12Gb/s give you a clean, validated path to external JBOD enclosures without improvising with non-HPE adapters or fighting firmware compatibility issues down the road.

Technical Highlights:

• 238 physical drive support: A single controller can address an entire multi-shelf JBOD stack — you're not forced to add controllers as the archive grows, which keeps management simpler and reduces the risk of controller-level single points of failure multiplying across your storage fabric.
• RAID 5 and RAID 10: RAID 5 is the right call for deep retention tiers where you need capacity efficiency and can tolerate a single drive failure during rebuild — common in long-term video archive pools. RAID 10 makes sense for the active write pool feeding your VMS ingest nodes where rebuild time risk during a failure is less acceptable.
• PCIe 3.0 x8 interface: At 1,200 MB/s of controller bandwidth per lane, the PCIe bus is not the constraint here — the drives will saturate before the host interface does, which is the correct architectural balance for a storage controller in a write-intensive workload.

Deployment Considerations:

• Confirm your Gen10 chassis has a PCIe 3.0 x8 slot electrically available — not just physically open. Some Gen10 configurations use bifurcated slots that may not deliver the full x8 electrical width the E208E-P SR requires.
• The 804398-B21 is parts-only warranty for 3 years, which means labor is not covered. Factor that into your service contract planning if this controller is in a mission-critical retention node with SLA obligations.

This controller earns its place in HPE Gen10-based evidence archival servers and NVR back-end storage nodes where external JBOD expansion is part of the design — specifically where a single controller managing 100+ drives across multiple shelves needs to be a solved problem, not an ongoing integration exercise.