Copied this from AMD STOREMI USER GUIDE: https://www.amd.com/system/files/2018-04/AMD-StoreMI-Users-Guide.pdf
User Guide AMD StoreMI™ is a tiered storage acceleration solution designed to run on AMD Socket sTR4 X399 or Socket AM4 400-series motherboards and Windows 10 64-bit systems.
It utilizes up to 256GB of any solid state drive (SSD) as a fast tier, and combines it with a large-capacity mechanical hard disk drive (or second SSD) into a single drive letter as seen by Windows 10 operating system.
AMD StoreMI is not caching solution; it utilizes advanced machine intelligence, virtualization and automated MicroTiering™ to analyze the data blocks that are most often accessed and actually moves those blocks to the fastest storage tier.
StoreMI operates consistently at the same performance levels as SSDs, continuously adapting to changing storage usage patterns in real time. As a result, the user experiences the performance of the fastest tier SSD drive, combined with the large capacity and low-price advantages of the mechanical hard disk in a single, large, and easy-to manage drive.
Check the following prior to upgrading your system to StoreMI:
Your system meets the minimum configuration: AMD RyZen, 4xx series motherboard with a minimum of 4G RAM (6G RAM to support RAM cache).
Secure Boot is NOT enabled. Consult your system documentation for further details.
There are no other SSD caching or AMD software RAID solutions installed.
The BIOS SATA disk settings are set to AHCI, not RAID and there is no software RAID installed on the system.
Microsoft’s chkdisk or other third-party disk scan tools run error free on the boot drive
A new unused SSD or HDD is available If wishing to use bootable tiers > 2TB in size, the system must be configured to boot in UEFI
