Seagate ST9235 Family Installation Manual page 6

4 ST9235 Family Installation Guide, Rev. B
Master/slave
Pin 1
configuration jumpers
Pin 20 removed for keying
A C
B D
Drive is master; no slave present
Drive is master; Seagate slave drive present
Drive is slave; Seagate master drive present
Reserved positions (do not use)
Figure 1. AT interface cable connector and master/slave
configuration jumpers
Note. Drive is shown with
circuit board up.
Circuit board