HPE P47952-001 MR416i-o 8GB Storage Controller

HPE P47952-001 is the service-spare number for the MR416i-o Gen11 x16 Lanes 8GB Cache OCP SPDM Storage Controller. HPE lists it in ProLiant Gen11 maintenance documentation as an OCP storage controller, distinguishing it from the MR416i-p plug-in PCI version and cacheless MR216 models. This page focuses on what that architecture means for a Gen11 server build: an x16-lane controller with 8GB cache in the supported OCP storage-controller position.

The “i-o” Identity Is Important

HPE controller names contain useful clues. MR416i-o identifies an internal storage controller in an OCP form factor. The related MR416i-p uses a PCI plug-in format and carries a different spare number. A buyer replacing an existing controller therefore needs more than “MR416” or “8GB cache” to identify the correct physical component.

HPE-Documented Profile

Why Controller Choice Shapes the Storage Build

The controller sits between the server and its supported drive configuration. It should be selected together with chassis backplane and drive technology. In a CTO system such as the HPE P52499-B21 DL360 Gen11 8SFF server, the controller is part of the overall storage design rather than an isolated accessory.

Cache Is Only One Part of Performance

The documented 8GB cache is important, but storage performance also depends on drives, RAID layout, workload and server I/O path. The x16-lane and OCP identities are equally important when matching the physical Gen11 configuration.

Different Storage Interfaces Need Deliberate Design

The HPE P49746-001 1.6TB SAS Mixed Use SSD is a 12G SAS Smart Carrier family, while the HPE P18442-002 960GB SATA Mixed Use SSD uses SATA. The HPE P41074-001 480GB SATA RI SSD has a different endurance profile again.

MR416i-o versus Network Hardware

The HPE P26987-001 Broadcom BCM57416 adapter is an Ethernet NIC, while P47952-001 is a storage controller. Their functions are unrelated even if both form part of a modern ProLiant I/O design.

Memory and Storage Need Separate Planning

Adding the HPE P64705-B21 16GB DDR5-5600 kit can address memory capacity, but it does not change storage-controller capability. Conversely, a controller replacement does not solve insufficient RAM.

Service Replacement by Spare Number

P47952-001 is useful when HPE maintenance documentation identifies the controller by spare number. Replacing like-for-like can preserve a known Gen11 storage architecture without confusing it with the MR416i-p PCI version, whose spare is P47951-001.

New and Refurbished Controllers

New controllers can support compatible builds and planned service stock. Refurbished P47952-001 controllers can be practical for Gen11 servers already configured around the MR416i-o. Installed firmware, supported configuration and included accessories should correspond to the actual product supplied.

Why the OCP Form Factor Matters inside a 1U Server

Compact rack servers have limited PCIe and internal expansion space. An OCP storage-controller position allows a supported controller to be integrated without consuming the same plug-in slot arrangement used by the MR416i-p. This is one reason the “-o” and “-p” suffixes should not be ignored. They describe different physical implementations even where the controller family and cache capacity are similar.

Useful during Controller Replacement

If a server already contains the MR416i-o, P47952-001 gives the maintenance team the service-spare identity used by HPE. A like-family replacement can keep the existing cabling, backplane and storage design aligned with the documented configuration. Controller replacement can affect RAID availability and stored configuration, so the server’s maintenance and data-protection procedures remain important during service.

Plan Drives and RAID around the Workload

An 8GB-cache controller can support different storage designs, but the appropriate RAID level and drive class depend on the application. High-capacity SAS SSDs, SATA Mixed Use drives and Read Intensive media each address different cost, endurance and performance requirements. The controller is therefore one layer of the storage architecture rather than the single component that determines application performance.

For planned spares, recording P47952-001 alongside the server model and installed backplane gives the maintenance team more context than the controller name alone. This can shorten identification work when a replacement is needed during a service window.

The spare identity is also useful when several Gen11 controller variants are held in the same workshop. Recording the “i-o” OCP form factor with the part number reduces the chance of selecting the physically different MR416i-p during a time-sensitive repair.

Source the Correct Gen11 Controller

Euroland IT Store can help source P47952-001 and related HPE Gen11 components in New or Refurbished condition where available.

P47952-001 FAQs

What is HPE P47952-001?

It is the service spare for the HPE MR416i-o Gen11 x16 Lanes 8GB Cache OCP SPDM Storage Controller.

How much cache does it have?

8GB.

How many lanes are documented?

x16 lanes.

Is it an OCP controller?

Yes.

Is it the same as the MR416i-p?

No. The MR416i-p is a PCI plug-in controller and uses a different HPE spare number.

Is P47952-001 listed for DL360 Gen11?

Yes. HPE includes it in the DL360 Gen11 controller spare-parts list.