HPE P58335-B21 MR408i-o Storage Controller

The HPE P58335-B21 is the HPE MR408i-o storage controller for HPE ProLiant Gen11 servers, a cache-equipped hardware RAID controller in the OCP form factor. Built on Broadcom MegaRAID technology, the MR408i-o combines tri-mode SAS, SATA, and NVMe drive support with onboard cache and hardware RAID processing, making it the controller of choice for Gen11 workloads that demand protected write performance rather than simple pass-through connectivity.

Where the cache-less MR216i-o suits software-defined designs, the P58335-B21 targets classic hardware RAID use cases: database servers needing low-latency protected writes, standalone hosts without cluster-level resilience, and applications where RAID 5, 6, and 10 volumes managed in hardware remain the right architecture. The controller’s cache absorbs write bursts and accelerates workloads, while its OCP slot placement keeps standard PCIe slots free for network adapters and accelerators in dense Gen11 configurations.

For UK buyers, the practical obstacles with current-generation controllers are price and availability. Euroland IT Store, a trusted UK supplier of new and refurbished HPE hardware and enterprise equipment, stocks the HPE P58335-B21 in both conditions, with every controller tested before dispatch and covered by warranty. That opens the MR408i-o to a wider range of projects: new Gen11 server builds, upgrades from entry controllers, and urgent replacement of failed units in production machines where a like-for-like swap protects existing RAID arrays and data.

Typical customers include database administrators specifying protected write performance, IT teams standardising Gen11 fleet configurations, and resellers building servers to customer specification. If you need to confirm fitment for a specific ProLiant model, compare the MR408i-o with other Gen11 controller options, or price a multi-server order, our team can respond quickly with stock, compatibility guidance, and a formal quote.

Key Features

• Genuine HPE part, SKU P58335-B21
• HPE MR408i-o Gen11 controller with Broadcom MegaRAID technology
• Onboard cache accelerates and protects write operations
• Hardware RAID support for common levels including RAID 5, 6, and 10
• Tri-mode connectivity for SAS, SATA, and NVMe drives
• OCP form factor preserves PCIe slots in dense configurations
• Designed for HPE ProLiant Gen11 server platforms
• Strong fit for database, application, and standalone host workloads
• Available new and refurbished, tested before dispatch
• Managed via standard HPE server firmware and tooling

Compatibility

• Designed for HPE ProLiant Gen11 servers with a compatible OCP controller slot
• Includes selected HPE ProLiant Gen11 configurations across the DL and ML ranges
• Exact fitment depends on server model, backplane, and cabling
• Confirm your server SKU and drive configuration with our team before purchase to ensure a correct match

Benefits

The MR408i-o delivers the performance characteristics that transactional workloads depend on: cached, hardware-managed writes with RAID protection handled independently of the host CPU. For a database or line-of-business application server, that means consistent latency under load and volume resilience that does not consume host resources. Tri-mode support protects your investment as drive technology shifts, letting the same controller serve SAS today and NVMe tomorrow. Buyers weighing hardware RAID against pass-through designs can compare it with the cache-less HPE P47789-B21 MR216i-o storage controller, while the HPE P48183-B21 NS204i-u NVMe boot device completes the Gen11 storage design, and cache-protected configurations are often maintained with spares such as the HPE 871264-001 96W Smart Array battery.

As a replacement part, the P58335-B21 has direct availability value: swapping a failed controller like-for-like preserves array configurations and restores a production server with minimal risk. Commercially, sourcing from Euroland IT Store makes Gen11 storage performance attainable at better cost. Tested refurbished controllers reduce spend on multi-server projects, new units satisfy formal procurement requirements, and warranty-backed UK stock removes the lead-time uncertainty that can stall builds and repairs. With new and refurbished availability side by side, plus a full category of RAID controllers to compare, you can match condition to budget without compromising on capability or support.

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