The system cannot be started after AHCI is enabled

      Recently installed 32 Bit Edition 2007 System , Use is normal , Later I was there. BIOS Set the working mode of the hard disk to AHCI Pattern , When you start, the blue screen , Only when it is restored to normal mode can it start normally .

    After a toss , To figure out what's going on . Originally in Win7 in , If installing the system , The hardware is not turned on AHCI Pattern , Directly after installation BIOS Changing to this mode will lead to the blue screen phenomenon . The correct way to do this is to change the to in the registry

【HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\Msahci】 Below “Start” Item set to “0”, Save settings . Restart and switch to BIOS Set the mode , Then set the working mode of the hard disk to AHCI that will do .

Be careful ： AHCI It's serial ATA English abbreviation of advanced master interface , It is Intel A technology dominated by , It allows storage drivers to enable advanced SATA function , Such as local command queue （ NCQ） And hot plug . Turn on AHCI Then you can play SATA The potential performance of hard disk , In theory, it can increase 30% Hard disk read and write speed . For example, some hard drives are Win7 In the system grouping function of 5.8, And switch to AHCI After the mode, you can brush to 5.9. stay Win XP In the system , It needs to be configured manually SATA Drive before turning on the hard disk AHCI Pattern . If the blue screen appears after switching , Directly switch the hard disk mode to IDE Mode can return to normal .