User Manual

IOWA-LX-600 Half-size CPU Card
Page 86

Mode 4
PIO mode 4 selected with a maximum transfer rate of 16.6MBp s.
 IDE UDMA [Auto]
Use the IDE UDMA option below to select the Ultra DMA (UDMA) mode for the following
HDDs:
 IDE Primary Master UDMA
 IDE Primary Slave UDMA

Disabled
The UDMA for the HDD device is disabled.

Auto
(Default) The computer selects the correct UDMA.
 IDE DMA transfer access [Enabled]
Use the IDE DMA transfer access option to enable or disable DMA support for IDE
devices connected to the system.

Disabled
All IDE drive DMA transfers are disabled. The IDE drives
use PIO mode transfers.

Enabled
(Default) All IDE drive DMA transfers are enabled.
 IDE HDD Block Mode [Enabled]
If the drive connected to the system supports block mode, use the IDE HDD Block Mode
option to enable the system to detect the optimal number of block read/writes per sector
the system IDE drive can support. Block mode is also called block transfer, multiple
commands, or multiple sector read/write.

Disabled
Block mode is not supported.

Enabled
(Default) Block mode is supported.