Enables advanced power-saving states for connected storage devices. Troubleshooting "AHCI Drive Init" Hangs

The standard initialization process can be broken down into three distinct phases: , Port Discovery , and Command Engine Activation .

Allows the drive to optimize the order in which it executes read and write commands, significantly improving performance.

With the port engine active, the host must determine what type of device (if any) is attached. AHCI does not assume a SATA drive—it could be an ATAPI device (optical drive), an eSATA hot-plug drive, or a port multiplier.