BIOS SPECIFICATION
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7.2.1 IDE Configuration:
7.2.1.1 Primary Master/Slave IDE
At system boot, the Intel Ultra ATA Storage Driver configures each ATA/ATAPI device to transfer
data at particular transfer modes. These transfer modes are defined by ATA standards, and are either
Programmed I/O (PIO) or Direct Memory Access (DMA or UltraDMA) type transfers. The Intel Ultra
ATA Storage Driver usually configures devices for their fastest capable transfer modes; however, there
may be times when a different (perhaps slower) transfer mode is appropriate for a particular device or
system configuration.
For hard disks and CD-ROM drives, BIOS can detect them automatically. Users may enter the
selected(highlighted) item to get more detailed information. The “Type” field can be set by users to force
BIOS to apply different setting on the devices when it detects them. There are four types provided by
BIOS for users. Detailed description for each type is described below
[Not Installed]: Disabled current device
[Auto]: To use BIOS default setting
[CD/DVD]: Apply CD/DVD setting on the device
[ARMD]: Apply ARMD setting on the device