Cable-Select Option; Figure 5. Connecting Cable-Selected Drives - Seagate Medalist SL Product Manual

22 Medalist SL Family Product Manual, June 1996

2.3.4 Cable-select option

Computers that use the cable-select method for determining the master
and slave drive do so by selecting or deselecting pin 28, CSEL, on the
interface bus. Figure 5 shows a typical cable-select configuration. The
master and slave drives are determined by their physical position on the
cable:
• The drive plugged into the I/O connector that carries the CSEL signal
is the master.
• The drive plugged into the I/O connector that does not carry the CSEL
signal is the slave.
To configure the drives for computers that use cable select:
• Install jumpers on pins 9 and 10 as shown in Figure 4 on page 20.
Connect the drives to the bus as shown in the example in Figure 5.
Line 28 is open
Master
Pin 28 is grounded
at computer
Computer

Figure 5. Connecting cable-selected drives

Slave