Seagate 540SL - Manual (Page 9)

Circuit
board
side up 9
10
7
8
5
6
3
4
1
2
One drive only
Drive is master;
slave is present
Drive is slave when
another drive is master
Cable select
Remote LED
connection
pin 11 (–), pin 12 (+)
Spares
12
11
Master/slave timing protocol.
Drive waits up to 30
seconds for slave to
respond.
Figure 2. Options jumper block settings
Medalist SL Family Installation Guide, November 1995 7