HPE Proliant Compute DL360 GEN12 MR932I-P 4EDSFF X4 BOX 1/2 PCIE SLOT1/2 Control - P76509-B21

HPE P76509-B21 ProLiant DL360 Gen12 MR932i-P PCIe Storage Controller

Overview

The P76509-B21 is HPE's MR932i-P storage controller designed for the ProLiant DL360 Gen12 platform. Configured for the 4E DSFF (E1.S) drive bay topology and occupying the BOX 1/2 PCIe Slot 1/2 position, this card is a purpose-built fit for DL360 Gen12 systems requiring storage controller capacity in that specific bay and slot configuration. The PCIe interface means it slots directly into the server's high-speed fabric — no additional adapters or interposers required. If you are sourcing a replacement or expansion controller for a DL360 Gen12 build using DSFF drives, P76509-B21 (often searched as P76509 B21) is the model to verify against your chassis bill of materials.

Key Features

• PCIe Interface: Direct PCIe bus attachment delivers the low-latency, high-bandwidth path that storage controllers require in dense server environments — no bandwidth bottleneck from legacy HBA bus designs.
• 4E DSFF Drive Support: Matched to the E1.S (DSFF) form-factor drive bays on the DL360 Gen12 — confirms physical and electrical compatibility before you order, avoiding costly re-stocking on misfitted parts.
• BOX 1/2 PCIe Slot 1/2 Placement: This controller occupies a defined internal slot position. Verify your DL360 Gen12 chassis slot availability before ordering — this is not a universal-slot card.
• Low Profile at 0.58 lb: At under 0.6 lb, the card adds negligible weight to a rack chassis — relevant when calculating total rack load for dense 1U deployments.

Integration & Compatibility

The P76509-B21 is designed specifically for the HPE ProLiant server line and the DL360 Gen12 chassis. If you are building or expanding a rack server deployment, confirm your chassis supports the MR932i-P controller in the BOX 1/2 slot before purchasing. For storage planning guidance, review our storage controller category to compare options across the DL360 family. Pairing with appropriate DSFF NVMe drives completes the storage stack for this platform.

Frequently Asked Questions

Q: What server platform is the P76509-B21 designed for?

A: The P76509-B21 is designed for the HPE ProLiant DL360 Gen12 server platform, specifically in the BOX 1/2 PCIe Slot 1/2 position with 4E DSFF drive bay support.

Q: What interface does the P76509-B21 use?

A: The P76509-B21 uses a PCIe interface, providing direct high-speed bus connectivity within the DL360 Gen12 chassis.

Q: What drive form factor does the P76509-B21 support?

A: The product name specifies 4E DSFF, indicating support for E1.S (DSFF) form-factor drives used in the DL360 Gen12 DSFF bay configuration.

Q: How much does the P76509-B21 weigh?

A: The P76509-B21 weighs 0.58 lb, adding negligible load to a rack chassis.

Q: Can the P76509-B21 be used in other HPE ProLiant models?

A: Based on available evidence, the P76509-B21 is specified for the DL360 Gen12. Compatibility with other ProLiant models is not confirmed in the available documentation — consult HPE's QuickSpecs for the target chassis before ordering.

Karl Wilson

The P76509-B21 is a slot-specific controller — and that specificity is the entire point. When you are configuring a DL360 Gen12 around DSFF (E1.S) drives and need the MR932i-P controller to land in BOX 1/2 PCIe Slot 1/2, this is the exact part number to order. Getting this wrong means re-stocking a controller card, which costs time on a live deployment.

Technical Highlights:

• PCIe Interface: Direct bus attachment — the storage controller communicates over the server's native PCIe fabric, which is the correct architecture for latency-sensitive workloads running on NVMe DSFF drives.
• 4E DSFF Configuration: The '4E' designation identifies the drive bay count and form factor — aligns with DL360 Gen12 DSFF chassis variants, not the LFF or SFF bay configurations.
• 0.58 lb Card Weight: Negligible rack load impact — relevant when you are calculating per-chassis weight budgets in high-density 1U deployments.

Deployment Considerations:

• Verify your DL360 Gen12 chassis order code confirms the DSFF bay option before purchasing this controller — chassis variants differ and not all Gen12 DL360s ship with DSFF bays pre-provisioned.
• The BOX 1/2 PCIe Slot 1/2 designation is a hard placement constraint — if that slot is already occupied in your chassis configuration, this card will not fit without a redesign of the storage layout.

Best fit for a DL360 Gen12 build targeting high-density DSFF NVMe storage in a 1U rack footprint where slot placement has already been validated against the chassis QuickSpecs.