I am trying to enable AHCI in Mac Pro running Vista 32. Mainly I want to take advantage of Native Command Queuing (NCQ) available in AHCI mode.
For PC computers, it is possible to enable AHCI for previously installed Vista running in PATA/DMA mode. This is outlined by Microsoft Knowledge Base #922976 ( http://support.microsoft.com/kb/922976 ). I have enable AHCI mode for Dell computers running Vista following above instruction.
So naturally, I tried to enable AHCI for Mac Pro running Vista. After enabling Microsoft AHCI driver as instructed in MSKB #922976, I extracted AHCI driver from Intel matrix storage manager and manually updated ESB Ultra ATA storage controller driver with iastor driver.
This seems to enable AHCI for Mac Pro running Vista under device manager and increased I/O rate. Great! I thougth.
However this disenabled IDE for CD drivers. Sure enough Microsoft has KB #928253 for "SATA optical drives are not available after you start a Windows Vista-based computer". Unfortunately even with this hotfix, my Mac Pro couldnt access or find CD/DVD drives.
Only way to restore access was to put Mac Pro back into Ultra ATA mode.
So my question is has anyone successfully enabled AHCI for Mac Pro running Vista and still have access to CD/DVD drives?
For PC computers, it is possible to enable AHCI for previously installed Vista running in PATA/DMA mode. This is outlined by Microsoft Knowledge Base #922976 ( http://support.microsoft.com/kb/922976 ). I have enable AHCI mode for Dell computers running Vista following above instruction.
So naturally, I tried to enable AHCI for Mac Pro running Vista. After enabling Microsoft AHCI driver as instructed in MSKB #922976, I extracted AHCI driver from Intel matrix storage manager and manually updated ESB Ultra ATA storage controller driver with iastor driver.
This seems to enable AHCI for Mac Pro running Vista under device manager and increased I/O rate. Great! I thougth.
However this disenabled IDE for CD drivers. Sure enough Microsoft has KB #928253 for "SATA optical drives are not available after you start a Windows Vista-based computer". Unfortunately even with this hotfix, my Mac Pro couldnt access or find CD/DVD drives.
Only way to restore access was to put Mac Pro back into Ultra ATA mode.
So my question is has anyone successfully enabled AHCI for Mac Pro running Vista and still have access to CD/DVD drives?