Asus SK8N User Manual page 48

2. IDE connectors (40-1 pin PRI_IDE, SEC_IDE)
This connector supports the provided UltraDMA133/100/66 IDE hard
disk ribbon cable. Connect the cable's blue connector to the primary
(recommended) or secondary IDE connector, then connect the gray
connector to the UltraDMA133/100/66 slave device (hard disk drive)
and the black connector to the UltraDMA133/100/66 master device. It
is recommended that you connect non-UltraDMA133/100/66 devices to
the secondary IDE connector. If you install two hard disks, you must
configure the second drive as a slave device by setting its jumper
accordingly. Refer to the hard disk documentation for the jumper
settings. BIOS supports specific device bootup. If you have more than
two UltraDMA133/100/66 devices, purchase another UltraDMA133/
100/66 cable. You may configure two hard disks to be both master
devices with two ribbon cables – one for the primary IDE connector
and another for the secondary IDE connector.
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SK8N IDE Connectors
For UltraDMA133/100/66 IDE devices, use an 80-conductor IDE cable.
The UltraDMA/66 cable included in the motherboard package also
supports UltraDMA133 or UltraDMA100.
2-22
Pin 20 on each IDE connector is removed to match the covered
hole on the UltraDMA cable connector. This prevents incorrect
orientation when you connect the cables.
The hole near the blue connector on the UltraDMA100/66 cable is
intentional.
SK8N
NOTE: Orient the red markings
(usually zigzag) on the IDE
ribbon cable to PIN 1.
PIN 1
Chapter 2: Hardware information