Wednesday, September 08, 2010

Speed Up SATA Hard Disk Performance with AHCI

The Advanced Host Controller Interface(AHCI) will speed up read and write operations of the hard drive if the hard drive supports AHCI.


AHCI includs a PCI BAR (base address register) to achieve the native SATA function. As the AHCI successfully develops a unified interface,allow the Serial ATA product development work greatly simplified. It can achieve a number of features including NCQ (Native Command Queuing).

This is a tip to enable AHCI at the boot level to speed up the performance of your SATA disk.

  1. Start your registry with "regedit".
  2. Browse to the "HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\Msahci"
  3. Locate the parameter "Start" on the right side.
  4. Double click it to change its value from 3 to 0.
  5. Restart the computer.