Aaeon SBC-770 User Manual page 41

You can attach up to four Enhanced Integrated Device Electronics
hard disk drives to the mainboard's internal controller. The
mainboard's IDE controller uses a PCI local-bus interface. This
advanced interface supports faster data transfer and allows the IDE
hard drive to exceed 528 MB.
Connecting drives is done in a daisy-chain fashion and requires
one of two cables, depending on the drive size.
Wire number 1 on the cable is normally red or blue, and the other
wires are usually gray.
1. Connect one end of the cable to CN7 or CN8. Make sure that
the red (or blue) wire corresponds to pin 1 on the connector,
which is labeled on the board (on the right side).
2. Plug the other end of the cable to the Enhanced IDE hard drive,
with pin 1 on the cable corresponding to pin 1 on the hard
drives. (see your hard drive's documentation for the location of
the connector).
Connect a second drive as described above.
Unlike floppy drives, IDE hard drives can connect to either end
of the cable. If you install two drives, you will need to set one
as the master and the other one as the slave by using jumpers
on the drives. If you install just one drive, set it as the master.
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