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LS-120 Drive Rear Panel Connectors and Jumpers 
NOTE: 
Set the jumpers located on your LS-120 drive according to your system 
configuration. If you have two drives on a single IDE cable, make sure 
you set one of them as Master and the other as Slave.
LS-120 Drive Jumper Settings
Abbreviation Jumper Name Function
MA Master Configures the LS-120 drive as 
the Master drive on the secondary 
IDE channel.
SL Slave Configures the LS-120 drive as 
the Slave drive on either the 
primary or secondary IDE 
channel.
CS Cable Select This setting is only for computers 
that use cable-select cable.
MDO Factory Setting For factory use ONLY. Do not use 
this setting.