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27 Chapter 4
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.
The settings are: Enabled (Default), Disabled.
On-Chip Primary (SATA) / Secondary (PATA) PCI IDE
The integrated peripheral controller contains an IDE interface with sup-
port for two IDE channels. Select Enabled to activate each channel sepa-
rately. The settings are: Enabled (Default) and Disabled.
IDE 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 inter-
face supports. Modes 0 through 4 provide successively increased perfor-
mance. In Auto mode, the system automatically determines the best mode
for each device. The settings are: Auto (Default), Mode 0, Mode 1, Mode
2, Mode 3, Mode 4.
IDE Primary/Secondary Master/Slave UDMA
Ultra DMA/33 implementation is possible only if your IDE hard drive
supports it and the operating environment includes a DMA driver (Win-
dows 95 OSR2 or a third-party IDE bus master driver). If your hard drive
and your system software both support Ultra DMA/33 and Ultra DMA/66
and Ultra DMA/100, select Auto to enable BIOS support. The settings
are: Auto (Default), Disabled.
Note: Because CF Socket and 2.5”HDD Connector are
the same IDE Channel (PATA).CF and HDD had
a lot of Compatibility issues of timing and loading
effect, when you need two devices in MIC-
3321.Setting IDE HDD Block Mode and Second-
ary Master/Slave UDMA Disabled.You must test
compatibility in your system.