What is the AHCI Mode ?

AHCI (the Advanced Host Controller Interface),in Intel's guidance, by the number of companies R & D interface standard, which allows the storage driver to enable advanced Serial ATA features such as Native Command Queuing and hot plug, its R & D team members include Intel, AMD, Dell, Marvell, Maxtor, Microsoft, Red Hat, Seagate and StorageGear famous enterprises.

The AHCI essence is a PCI class device to play the role of a common interface (ie, it is common to different operating systems and hardware), in between the internal logic of the system memory bus and Serial ATA devices. This device class describes the general system memory structure with control and status area, the command sequence entry table; each command table entry contains the SATA device programming information, and a point (used in the device and host transfer data) that describes the table pointer.

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