Seagate ST9100A Computer Drive User Manual


 
Master/slave
configuration jumpers
Pin 1
Pin 20 removed
for keying
Circuit board
A C
B D
Drive is master, no slave drive present
Drive is master; Seagate slave drive present
Drive is slave; Seagate master drive present
Reserved position (Do not use)
Figure 1. AT interface cable connector and master/slave
configuration jumpers
4 ST9100A and ST9100AG Installation Guide, Rev. A