VIA Technologies KM400, Руководство пользователя

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BIOS
Page 4-14
OnChip IDE Channel0/1
The integrated peripheral controller contains an IDE interface with support for two
IDE channels. Select
Enabled to activate each channel separately.
Options: Enabled, Disabled.
Note: If you do not use the onboard IDE connector, then you will need to set the
Onboard Primary PCI IDE and Onboard Secondary PCI IDE to Disabled.
IDE Prefetch Mode
Selecting Enabled reduces latency between each drive read/write cycle, but may
cause instability in IDE subsystems that cannot support such fast performance. If
you are getting disk drive errors, try setting this value to Disabled. This field does
not appear when the Internal PCI/IDE field, above, is Disabled.
Options: Enabled, Disabled.
Primary/Secondary Master/Slave PIO
The four IDE PIO (Programmed Input/Output) fields let you set a PIO mode (0-4) for
each of the four IDE devices that the onboard IDE interface supports. Modes 0 to 4
provide successively increased performance. In Auto mode, the system automati-
cally determines the best mode for each device.
Options: Auto, Mode 0 ~ 4.
Primary/Secondary Master/Slave UDMA
This allows you to select the mode of operation for the IDE drive. Ultra DMA-33/66/
100/133 implementation is possible only if your IDE hard drive supports it and the
operating environment includes a DMA driver. If your hard drive and your system
software both support Ultra DMA-33/66/100/133, select Auto to enable UDMA
mode by BIOS or you can manually disable it.
Options: Auto, Disabled.
IDE HDD Block Mode
Block mode is also called block transfer, multiple commands, or multiple sector read/
write. If your IDE hard drive supports block mode (most new drives do), select
Enabled for automatic detection of the optimal number of block read/writes per
sector the drive can support.
Options: Enabled, Disabled.