VIA Technologies KT400A, User Manual

Page: 45 / 88

BIOS
Page 4-13
VIA OnChip IDE Device
Scroll to VIA Onchip IDE Device and press <Enter>. The following screen appears:
IDE DMA transfer access
Automatic data transfer between system memory and IDE device with minimum CPU
intervention. This improves data throughput and frees CPU to perform other tasks.
Options: Enabled, Disabled.
OnChip IDE Channel0/1
The mainboard supports two channel of ordinary IDE interface. Select “Enabled” to
activate each channel separately.
Options: Enabled, Disabled.
Note: If you do not use the onboard IDE connector, 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 UDMA
Select the mode of operation for the IDE drive. Ultra DMA-33/66/100/133 implemen-
tation is possible only if your IDE hard drive supports it and the operating environ-
ment 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.
Options: Auto, Disabled.