HPE P58543-001 MR408i-o Storage Controller

HPE P58543-001 is the service spare for the MR408i-o Gen11 x8 Lanes 4GB Cache OCP SPDM Storage Controller. HPE maintenance guides list it across several supported ProLiant Gen11 systems. Its exact identity matters because HPE also offers MR216 and MR416 controllers, plus different physical type-o and type-p implementations.

Read the Controller Name Carefully

MR408i-o identifies an internal type-o/OCP storage controller. The OCP form factor is part of the replacement requirement and should not be confused with a PCI plug-in controller carrying a similar family name.

Documented Profile

Why the Spare Number Is Useful

HPE maintenance documentation identifies service components by spare number. P58543-001 therefore gives technicians a direct route to the intended MR408i-o replacement rather than a generic “Gen11 RAID controller”.

MR408i-o versus MR416i-o

The P47952-001 MR416i-o uses x16 lanes and 8GB cache. P58543-001 uses x8 lanes and 4GB cache. They are different controller configurations even though both are Gen11 OCP storage controllers.

Assembly Identity

The P58337-001 page is useful when the number on the physical board is the starting point. Recording both assembly and spare reduces confusion in workshops holding several similar controllers.

Cache in Context

Four gigabytes of cache is one characteristic, not a complete performance prediction. Drives, RAID level, backplane, workload and server I/O path also influence results. Controller choice should therefore be made as part of the storage architecture.

Drive Generations Still Matter

The P49751-001 6.4TB SAS 24G SSD and P49746-001 1.6TB SAS 12G SSD differ in interface generation and carrier. Controller, server and backplane support must align with the selected drive family.

New and Refurbished Controllers

New P58543-001 controllers can support compatible builds and service pools. Refurbished units can be practical for deployed Gen11 systems already using MR408i-o, with firmware context, included hardware and condition based on the actual unit.

Related Gen11 Components

See P58337-001, P47952-001, P49751-001, P26987-001 10Gb BASE-T adapter and P48499-001 DDR5-4800 memory.

Source P58543-001 by Service Identity

Euroland IT Store can help source New or Refurbished MR408i-o controllers where available.

Plan the Controller with the Backplane

A storage controller cannot be evaluated in isolation. The backplane, drive protocol, cabling and server configuration determine how its lanes are used. Matching these elements during the initial build can avoid unnecessary changes later.

Where the MR408i-o Sits in the Gen11 Controller Range

The MR408i-o occupies a different position from cacheless MR216 models and the higher-lane, higher-cache MR416i-o. Its x8-lane and 4GB-cache specification gives administrators another controller choice for supported Gen11 configurations. The right selection depends on drive count, storage layout, performance requirement and the server’s supported controller architecture rather than assuming the controller with the largest cache is always necessary.

Service Replacement Should Preserve the Known Architecture

During an unplanned controller failure, a like-family replacement can avoid introducing a wider storage redesign into the repair. P58543-001 gives the service team a precise reference for that purpose. Once the system is stable, any planned move to another controller family can be evaluated separately with its cabling, backplane, firmware and performance implications fully considered.

Document the Installed Controller after Service

After replacement, recording P58543-001, the server model and the installed storage layout creates a useful baseline for future work. If the server later receives additional drives or a backplane change, administrators can evaluate those changes against the controller actually present rather than relying on the original purchase specification.

OCP Form Factor Can Preserve PCIe Expansion

Using a supported type-o controller places storage control in the server’s intended OCP controller location rather than consuming the same physical arrangement as a plug-in controller. This architectural detail is one reason the form factor belongs in the part description.

For multi-server estates, keeping P58543-001 as a standard service reference can also simplify spare holdings. A technician can identify the controller from the maintenance guide, while the related assembly number provides a second check against the physical board before installation.

This makes the spare useful for both scheduled maintenance planning and faster identification during an unexpected controller fault.

This supports clearer long-term asset management.

P58543-001 FAQs

What is P58543-001?

The service spare for the HPE MR408i-o Gen11 x8 Lanes 4GB Cache OCP SPDM Storage Controller.

How much cache?

4GB.

How many lanes?

x8.

Which assembly is related?

P58337-001.

Is it MR416i-o?

No.

Is it documented for Gen11?

Yes, across multiple supported ProLiant Gen11 platforms.