HPE Proliant Compute DL360 GEN12 MR932I-P 2SFF Stacking X2 BOX1 BOX2 PCIE SLOT1 - P85805-B21

HPE P85805-B21 ProLiant DL360 Gen12 MR932i-P 2SFF PCIe Stacking Expansion Kit

Overview

The HPE P85805-B21 is a PCIe-interface stacking expansion component designed specifically for the HPE ProLiant DL360 Gen12 platform. Configured for the MR932i-P controller with a 2SFF (Small Form Factor) drive bay arrangement spanning Box1 and Box2, this kit provides the physical and electrical interconnect required to extend storage or controller capacity within the DL360 Gen12 chassis. If you are provisioning a DL360 Gen12 with the MR932i-P storage controller and need the Box1/Box2 2SFF stacking configuration, P85805-B21 is the specific option kit that enables that layout — the fit is chassis- and controller-specific, so confirm your server build before ordering.

Key Features

• PCIe Interface: connects via PCIe, which means the stacking interconnect operates at the bus bandwidth needed for modern SAS/SATA controller traffic — no throughput bottleneck introduced by the expansion path itself.
• 2SFF Drive Bay Configuration: supports two Small Form Factor drive positions across the Box1 and Box2 stacking arrangement, allowing the DL360 Gen12 to address additional storage slots without a chassis change.
• MR932i-P Controller Specific: engineered for the MR932i-P controller variant in the DL360 Gen12 lineup — this is not a generic backplane cable; the part number P85805-B21 (often searched as P85805 B21) maps to an exact controller-and-chassis pairing.
• Compact, Lightweight Build: at 0.23 lb, this is a low-mass interconnect component — it installs without adding meaningful weight to the 1U chassis, relevant for high-density rack deployments where cumulative weight is tracked.

Integration & Compatibility

This component is validated for the HPE ProLiant DL360 Gen12 server with the MR932i-P storage controller. Compatibility outside this specific platform — including earlier DL360 generations or alternate controller options — is not confirmed by available evidence. Consult HPE's option compatibility matrix or your HPE channel contact to verify fit against your specific server configuration before procurement. UNSPSC classification 26121620 categorizes this as a computer storage device component, consistent with a server backplane/stacking interconnect assembly.

Frequently Asked Questions

Q: What server platform is the HPE P85805-B21 designed for?

A: The P85805-B21 is designed for the HPE ProLiant DL360 Gen12 server, specifically in configurations using the MR932i-P storage controller with a 2SFF Box1/Box2 stacking layout.

Q: What interface does the P85805-B21 use?

A: The P85805-B21 uses a PCIe interface, which provides the high-bandwidth bus connectivity required for the stacking interconnect between the controller and drive bays.

Q: How much does the P85805-B21 weigh?

A: The P85805-B21 weighs 0.23 lb, making it a lightweight interconnect component suitable for 1U rack-dense deployments.

Q: Can the P85805-B21 be used with DL360 Gen10 or Gen11 servers?

A: Available evidence confirms compatibility only with the DL360 Gen12. Compatibility with Gen10 or Gen11 platforms is not verified — consult HPE's option compatibility documentation before ordering for an earlier generation.

Q: What does the UNSPSC code 26121620 indicate for this product?

A: UNSPSC 26121620 classifies this as a computer storage device component, consistent with its role as a server storage stacking/interconnect assembly within the DL360 Gen12 chassis.

James Everett

The P85805-B21 is a fit-specific interconnect — its entire reason for existing is to wire the MR932i-P controller into the 2SFF Box1/Box2 stacking configuration on the DL360 Gen12. At 0.23 lb, it adds no meaningful weight burden in a 1U build, but the tighter constraint is platform lock: this part maps to one controller on one server generation.

Technical Highlights:

• PCIe Interface: the bus-level connection means controller-to-backplane traffic runs at PCIe bandwidth — no throughput penalty from the interconnect itself, which matters when the MR932i-P is handling concurrent read/write across both SFF bays.
• 2SFF Box1/Box2 Stacking: addresses both drive positions in the stacking layout within a single option kit — one part number covers the full Box1-to-Box2 interconnect rather than requiring separate cables per bay.
• Lightweight at 0.23 lb: in high-density rack environments where every component's weight is logged for floor-load planning, a sub-quarter-pound interconnect kit is a non-issue — it won't push a fully-loaded DL360 Gen12 past weight thresholds.

Deployment Considerations:

• Verify your DL360 Gen12 build sheet specifies the MR932i-P controller and the 2SFF Box1/Box2 stacking configuration before ordering — this part does not adapt to alternate controller options or SFF counts in the same chassis.
• Evidence is limited to distribution-feed attributes; HPE's QuickSpecs for the DL360 Gen12 is the authoritative source for confirming this option kit's position in your server BOM.

Best fit: a DL360 Gen12 server build where the MR932i-P is the specified controller and the 2SFF stacking layout is required by the storage design — this is a BOM-driven procurement, not a discretionary upgrade.