Nvidia NFORCE2 ULTRA 400 400 User Manual page 41

BIOS
OnChip IDE Channel 0/1
The mainboard supports two channel of ordinary IDE interface and one channel of
serial ATA interface. Select "Enabled" to activate each channel separately.
Note: If you do not use the onboard IDE connector, set the Onboard Primary
(Secondary) PCI IDE to "Disabled".
Primary/Secondary Master/Slave UDMA
Select the mode of operation for the IDE drive. Ultra DMA-100/133 implementa-
tion 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-100/133, select Auto to enable UDMA mode by BIOS.
Options: Auto, 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.
OnChip Serial-ATA
This item enables/disables the S-ATA ports.
IDE RAID
This item allows you to enable RAID mode for IDE and SATA ports. When set to
"Enabled" the following six fields become available.
Options: Enabled, Disabled.
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.
IDE HDD Block Mode
IDE Block Mode allows the controller to access blocks of sectors rather than a
single sector at a time. The default is Enabled.
Options: Enabled, Disabled.
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