SATA Power Management

SATA has supported power management since its inception and manufacturers quickly adopted these ideas to minimize system power consumption. The original power saving modes for the SATA interface are Partial and Slumber. In Partial mode, the state is powered off, but must be able to come up to full operation within 10 microseconds. Slumber mode further reduces power, but can take as long as 10 milliseconds to become fully operational.

DevSleep provides yet another level of power management that instructs the device to enter a mode where the device is almost completely shut down, resulting in less power consumption within 5mW and come up to full operation with 20 microseconds. SATA allows interface power management to be Host Initiated (HIPM) or Device Initiated (DIPM), thus providing the flexibility to optimize the SATA components for a wide range of usages and applications.

Fixing the SSD Freezing after Sleep Mode

Essentially the issue is an incompatibility with the LPM (Link Power Management) feature of Intel SATA controllers. Setting the AHCI to active may have helped to get rid of the freezing. MEMXPRO has checked the issue and disable HIPM on certain SSD models. Please watch our slideshow for a quick overview.

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