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Green OCP storage controller card with silver heatsink and gold edge connector

HPE

HPE MR408i-o Gen11 8 Internal Lanes 4GB Cache OCP Storage Controller P58335B21

SKU CH-1R80-5M8KV MPN P58335B21

PCIe Gen4.0 storage controller with 4 GB cache and eight internal lanes for HPE Gen11 servers

  • PCIe Gen 4.0 bandwidth for high-throughput storage
  • 4 GB cache accelerates RAID 5 random write IOPS
  • OCP form factor fits dense server deployments
  • Broadcom MegaRAID technology ensures data protection
  • SPDM support strengthens firmware security posture

HPE MR408i-o Gen11 OCP Storage Controller

The HPE MR408i-o Gen11 is a PCIe Gen4.0 storage controller built on Broadcom MegaRAID technology for HPE compute platforms. It provides eight internal lanes and 4 GB of cache to accelerate RAID workloads in mission-critical environments. The OCP form factor allows flexible deployment across supported servers.

For RAID-centric deployments needing onboard cache

This controller suits administrators who require hardware RAID acceleration with dedicated cache for reduced rebuild times and consistent IOPS. It is not intended for configurations that operate purely in HBA or pass-through mode, nor for systems that lack an OCP 3.0 slot compatible with the MR408i-o form factor.

PCIe Gen4.0 interface with eight internal lanes

The single specification that determines fit is the PCIe 4.0 x8 host interface combined with eight internal device lanes. The server must provide an OCP 3.0 connector wired for PCIe 4.0 and the backplane must support the same lane count; without that match the controller cannot operate at its rated bandwidth.

Points forts

  • PCIe Gen 4.0 bandwidth for high-throughput storage
  • 4 GB cache accelerates RAID 5 random write IOPS
  • OCP form factor fits dense server deployments
  • Broadcom MegaRAID technology ensures data protection
  • SPDM support strengthens firmware security posture

Caractéristiques

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Questions sur cet article

How is the OCP storage controller installed in the server, and what alignment step is often missed?

Install the controller into the server OCP 3.0 slot, then seat the edge connector fully until the retention latch clicks. The step often missed is verifying the latch is fully engaged before powering on.

What maintenance or replacement will the 4GB cache module need later?

The 4GB cache module uses flash-backed write cache with a supercapacitor; the supercapacitor should be replaced every three to five years to maintain data protection during power loss.

What limit appears first when the controller runs sustained RAID 5 write workloads?

Sustained RAID 5 random writes reach 240K IOPS; the controller firmware will throttle further requests once this throughput ceiling is hit.

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