Acer Altos 600 Series User Manual page 72

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Parameter Description
IDE primary These items let you select the IDE hard disk
channel master parameters that your system supports. Auto
and slave enables BIOS to automatically detect the
parameters of installed HDDs during the
POST (power-on self-test). If you prefer to
IDE secondary
enter HDD parameters manually, select
channel master
User. Select None if no HDD is connected
and slave
to the system.
The IDE CD-ROM is always automatically
detected
Chapter 4 BIOS Utility
Option