HPE MR408i-p Gen11 Storage Controller (P74775-B21) is a PCI plug-in controller for connecting and managing server storage drives. It supports SAS, SATA and NVMe drive types, with capacity for up to 8 drives.
The controller has 4GB cache and an x8-lane configuration. HPE identifies it as a tri-mode Gen11 controller, making it suitable for server storage setups that use supported drive types. The MR Gen11 family supports RAID and HBA/pass-through use cases, with command-line, web-based and out-of-band management tools.
HPE specifies that a Smart Storage Battery (P01367-B21) or one of the listed Smart Hybrid Capacitors (P02381-B21 or P65042-B21) must be selected with this controller.