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Aggressive Link Power Management (ALPM)

109 bytes added, 11:28, 11 June 2015
/* AHCI Link Power Management */
== AHCI Link Power Management ==
AHCI Link Power Management is a mechanism where the SATA AHCI controller puts the SATA link to the internal HDD and/or SSD disk into a very low power mode when there's no IO (input/output) activity for a while. The controller automatically puts the link back into active power state when there's real work to be done. This is done to save power consumption by the HDD and/or SSD disk. Tests show that this can save around up to 0.4 5 Watts of power and decrease mSATA average temperature, depending on storage device and usage
* HIPM = Host Initiated Link Power Management
* DIPM = Device Initiated Link Power Management
 
=== Linux ===
Enabling and disabling To enable AHCI Link Power Management in Linux:<br>
* Create text file /etc/pm/power.d/sata_alpm
min_power
min_power
 
 
To disable AHCI Link Power Management simply delete:<br>
/etc/pm/power.d/sata_alpm file
<br>
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