How to disable NCQ?

Question

Is it possible to disable NCQ (Native Command Queuing) in Windows?

Note: NCQ is a feature of AHCI (Advanced Host Controller Interface), a standard that applies to SATA drives.

The reason one might want to disable NCQ is with the invention of "I/O priority" in Windows 7, Windows can no longer decide which operations it should run. Once a command has been queued, Windows is powerless to call it back. This can result in some pretty large I/O response times:

Answer 1

You may find your answer here, it's related to your OS and seems to be quite simple:

http://www.techenclave.com/operating-systems/how-to-disable-ncq-in-win7-157429.html

http://www.overclockers.com/forums/showthread.php?t=499700

Hope this help!

Answer 2

There is no way to disable NCQ in Windows.

Workaround

Since Native Command Queueing (NCQ) is a feature of AHCI, you can disable AHCI in your BIOS.

Once you've disabled AHCI, you'll lose all the features that came with it:

• Native Command Queueing
• hot-swappable drives
• support for the TRIM command