No AHCI Support in Boot Camp

Originator:Kyle.Blohn
Number:rdar://10818668 Date Originated:Sat, 10 Mar 2012 02:43:06 GMT
Status:Open Resolved:
Product:Hardware Product Version:
Classification:Performance Reproducible:Always
 
Summary: When running Windows on a Boot Camp partition, Apple's drivers do not enable AHCI mode on the SATA interface.

Steps to Reproduce: Launch Windows Device Manager. Select "IDE/ATA/ATAPI-controllers" section. Observe default storage driver operating in IDE mode.

Expected Results: Boot Camp drivers enable AHCI mode, increasing performance and enabling other features of drives.

Actual Results: Boot Camp drivers keep drive in IDE mode, severely limiting performance and features of internal drives.

Regression: Occurs on all Mac's, regardless of model or type of internal drive.

Notes: There is a massive thread online about enabling AHCI on early-2011 and late-2011 MacBook Pro's. Link http://www.ocztechnologyforum.com/forum/showthread.php?87950-Enabling-AHCI-for-Windows-on-MBP-2011-now-possible

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