P47785-B21: HPE MR216i-p Gen11 x16 Lanes without Cache PCI SPDM Storage Controller

Also listed as: P47785-001, P47953-001, P47785R-B21 · made by Broadcom

An entry-tier PCIe Gen4 x8 tri-mode storage controller engineered without write cache for cost-effective drive connectivity in HPE ProLiant Gen11 servers. Offering 16 internal lanes supporting SAS, SATA, and NVMe drives with basic RAID 0, 1, and 10 and passthrough JBOD capabilities, it eliminates the need for expensive battery energy packs. When buying used, inspect PCIe edge fingers for damage and ensure the proper bracket height is installed for your server chassis.

Specifications

About the P47785-B21

P47785-B21 is HPE's MR216i-p Gen11 Storage Controller, an entry-level tri-mode PCIe Gen4 x8 plug-in adapter built on Broadcom silicon without write cache. With 16 internal tri-mode lanes connecting up to 16 SAS (12Gb/s), SATA (6Gb/s), or direct-attached NVMe U.3 SSDs, it provides basic hardware RAID levels (RAID 0, 1, and 10) as well as unbuffered HBA/JBOD passthrough. Designed as an economical alternative to the premium MR416i-p, it does not require an HPE Smart Storage energy pack, making it ideal for software-defined storage (such as VMware vSAN) or simple boot and mirror configurations.

Compatibility

This standard half-height, half-length (HH/HL) PCIe card installs into standard PCIe riser slots across ProLiant Gen11 servers including the DL360 Gen11, DL380 Gen11, DL385 Gen11, DL325 Gen11, and ML350 Gen11. Connection to drive cages requires compatible internal SlimSAS cables. Because it lacks write cache memory, it does not support RAID 5 or RAID 6 and does not require energy packs or battery cables. It is not backward compatible with Gen10 or older servers. The option SKU is P47785-B21, with spare part number P47953-001.

How to identify a genuine unit

A genuine P47785-B21 carries an HPE label with option part number P47785-B21, spare number P47953-001, and Broadcom PCB identifiers on the rear circuit board. In iLO 6 under Storage, the card reports as the HPE MR216i-p Gen11 Controller, displaying DMTF SPDM security attestation and automated firmware compatibility with HPE Service Pack for ProLiant. Generic uncertified Broadcom MegaRAID cards will fail iLO security verification and will not integrate with iLO health monitoring.

Buying used

When evaluating second-hand MR216i-p controllers, verify whether the card comes with the low-profile (1U) or full-height (2U/tower) PCIe mounting bracket to match your server slot. Inspect the PCIe x8 gold edge fingers for scratches, delamination, or burn marks. Confirm that the internal SlimSAS ports are clean with undamaged spring contacts, and ask the seller to verify basic drive detection in StorCLI before purchasing.

Reference prices (last 12 months, updated 2026-10-27)

Prices seen on public listings on the dates shown, before tax and shipping. Not an offer.

Fits these models

• HPE ProLiant DL380 Gen11
• HPE ProLiant DL360 Gen11
• HPE ProLiant DL385 Gen11
• HPE ProLiant DL325 Gen11
• HPE ProLiant ML350 Gen11

Equivalent part numbers

• HPE P47789-B21 HPE MR216i-o Gen11 x16 Lanes without Cache OCP SPDM Storage Controller OCP 3.0 mezzanine form-factor equivalent

FAQ

Sources

• HPE Compute MR Controllers QuickSpecs, checked 2026-10-27