The 9540-2M2 is a low profile, half-length adapter fitting into a standard PCIe slot with two on-board M.2 drives. Customers who trust hardware RAID for critical data can expand this trust to their OS drives. There is no need to sacrifice two drive bays that can be used for user data. The 9540-2M2 adapter enables RAID 0 and RAID 1 using the trusted Broadcom MegaRAID stack.