Gigabyte GA-6SMM7 User Manual page 28

Secondary Master UltraDMA (for onboard IDE 2nd channel).
The default value is Auto.
Auto BIOS will automatically set the IDE HDD to Ultra
DMA/33 Mode.
Disabled Disable Ultra DMA HDD Function.
Secondary Slave UltraDMA (for onboard IDE 2nd channel).
The default value is Auto.
Auto BIOS will automatically set the IDE HDD to Ultra
DMA/33 Mode.
Disabled Disable Ultra DMA HDD Function.
IDE Burst Mode
The default value is Enabled.
Enabled Enable IDE Burst Mode.
Disabled Disable IDE Burst Mode.
IDE HDD Block Mode
The default value is Enabled.
Enabled Enable IDE HDD Block Mode.
Disabled Disable IDE HDD Block Mode.
Onboard FDC Controller
The default value is Enabled.
Enabled Enable onboard FDC port.
Disabled Disable onboard FDC port.
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BIOS Configuration