WIN8 installation win7 problem and dual operating system installation solution in pre-installed system environment

Installed many times the machine, various operating systems, this time in the WIN8 system has encountered some problems, now summarized as follows.

The lab teacher gave a new Dell machine, the original is the WIN8 operating system, very inconvenient, do not want to make this system off, so you want to install a win7, that is, dual operating system. This Dell machine, F2 is BIOS,F12, is the boot entry for the system.

The initial phase of the installation system found that the system's hard drive was not recognized, and the problem was that the hard drive's mode selection was wrong. This Dell machine, HDD mode has ATA and AHCI. Here are the two patterns, from the Baidu Encyclopedia.

Ata:ata Technology is a family of technical specifications for the IDE (Integrated Device Electronics). Initially, the IDE was just a hard-disk interface technology that attempted to integrate the controller with the disk body. With the increasingly extensive application of ide/eide, the global Standardization protocol induces the technical specifications used by the interface since its inception as a global hard drive standard, resulting in ATA (Advanced technology Attachment).

AHCI:AHCI (Serial ATA Advanced Host controller Interface) serial ATA Premium Master interface/Advanced host controllers interface, is an interface standard developed by a number of companies under the guidance of Intel It allows the storage driver to enable advanced serial ATA features, such as native command queuing and hot-swapping. The AHCI mode, in contrast to IDE mode, requires the installation of a SATA driver (and it seems that only this mode can turn on the NCQ function).

The Win7 is in ATA mode, and Win8 is in AHCI mode, so installing the win7 system in the default AHCI mode does not recognize the hard drive. It is therefore necessary to change the hard drive mode to ATA mode in the BIOS.

Install the dual operating system, is to put the system in a new hard disk partition, the method and the same steps as installed on the C disk, only the final need to perform the following system boot automatic repair.

After installation, please note: To use the Win7 system, you need to change the hard drive mode to ATA, otherwise the blue screen, you need to force shutdown. To use the WIN8 system, change the hard drive mode to AHCI, or you will be prompted to fail, the system restarts instead of a blue screen, which win8 do better than Win7.

Reference: http://jingyan.baidu.com/album/624e7459a369e334e8ba5af1.html

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WIN8 installation win7 problem and dual operating system installation solution in pre-installed system environment