Aggressive Link Power Management


Aggressive Link Power Management is a power management protocol for Advanced Host Controller Interface-compliant Serial ATA devices, such as hard disk drives and solid-state drives.

Description

When enabled via the AHCI controller, this allows the SATA host bus adapter to enter a low-power state during periods of inactivity, thus saving energy. The drawback to this is increased periodic latency as the drive must be re-activated and brought back on-line before it can be used, and this will often appear as a delay to the end-user.

States

There are three states:
These can be selected by the SATA AHCI driver, usually via a configuration option. Hot swapping is disabled.