BIOS setup hard drive working mode

BIOS setup hard drive mode, what does it mean to change the hard drive mode to IDE in BIOS?

Our hard disk is divided into two kinds of interfaces, one is IDE, the other is SATA. Previously all IDE, the current hard disk is basically SATA.

And if you want to drive Sata's hard drives, we need SATA drivers to do it. In the normal running of windows, SATA can be normally driven, need to drive this problem mainly involves the installation of the operating system.

If you want to install the operating system without SATA drive, then use this system disk boot machine can not install the system, because the system could not find your hard drive. Common strong like to find hard drive or find hard drive ghost do system or enter PE special slow and so on

There are two ways to solve this problem:

1. Use a system disk with SATA drive to start the machine and install the operating system.

2. That's what you said, go into the BIOS and change the hard drive mode to IDE compatibility mode so you can install a hard drive without a SATA drive.

The motherboard now supports three hard disk working modes: NORMAL, LBA, and large mode.

Normal Normal mode is the earliest IDE way. BIOS and IDE controllers do not allow parameters when accessing hard disk in this manner

What conversion. The maximum number of cylinders supported by this mode is 1024, the maximum number of heads is 16, the maximum number of sectors is 63, and the number of bytes per sector is 512. Therefore, the maximum hard drive capacity is supported: 512X63X16X1024=528MB. In this mode, even if the actual physical capacity of the hard disk

is larger, but can only be accessed 528MB of hard disk space.

LBA (Logical block addressing) logical chunk addressing mode. This mode manages the hard disk space to break through the 528KB bottleneck, up to 8.4GB. In LBA mode, the set of parameters such as cylinder, head, sector, etc. are not physical parameters of the actual hard disk.

When accessing the hard disk, the IDE controller converts the logical address determined by parameters such as cylinder, head, sector and so on to the physical of the actual hard disk

Address. In LBA mode, the maximum number of heads that can be set is 255, and the remaining parameters are the same as normal mode. This allows for the calculation of accessible

The hard disk capacity is: 512X63X255X1024=8.4GB.

Large large hard drive mode. This pattern can be used when the cylinder of the hard disk exceeds 1024 and is not LBA supported. Large model Mining

The method is to divide the number of cylinders by 2, multiply the number of heads by 2, and the total volume of the result is unchanged. For example, in normal mode, the number of cylinders is

1220, the head number is 16, enters the large mode the cylinder number is 610, the head number is 32. So in DOS it appears that the number of cylinders is less than 1024, i.e.

can work properly. At present, only LBA is practically meaningful.