Maxtor ATLAS 10K III Product Manual page 40

Installation
When the J7 SE jumper is installed, it forces single-ended SCSI operation, and
disables LVD mode and auto switch capabilities. When the jumper is not installed
it allows auto switch to single-ended SCSI or LVD SCSI operation.
Back of Drive
SCA J1
Connector
Note: Force Single Ended Jumper needs to be across 2 lower pins in the
3-14 Maxtor Atlas 10K III
J7
NC
SE
J7 Jumper Location on the 80-Pin SCA PCB
magnified 4-pin diagram.
Jumper J7
Front of Drive