Storage controller
A storage controller, , is a digital circuit that manages the flow of data going to and from a computer storage device.[1] The term "storage controller" may refer to either the storage interface controller on CPU or chipset, the flash memory controller on solid state drive, or the disk controller on hard disk drive.
History
In history, the storage interface controller is usually integrated in southbridge. AMD Zen 1 archirecture (2017) and Intel Rocket Lake archirecture (2021) had integrated the M.2 storage interface controller in CPU.
Variants
Floppy disk controller
In 1990s PCs, the floppy disk controller is usually integrated in Super I/O chip.
IDE controller
In older PCs, the IDE controller is usually integrated in southbridge.[2]
AHCI controller
The AHCI controller is usually integrated in southbridge.[3]
M.2 controller
The M.2 controller is usually integrated in SoC, CPU, or southbridge.
RAID controller
The RAID controller is usually found on more advanced computers such as servers.