Instruction manual

The switch card has other switches that are accessible only when the switch card is
removed from the 2104. They should only be changed when the 2104 is being
converted from a Model DU3 to a Model TU3, or from a Model TU3 to a Model DU3.
SCSI Address switch 7
When this switch is set to Off, which is its default setting in a 2104 Model DU3,
the SCSI addresses of the disk drives are 0, 1, 2, 3, 4, 5, 6, 8, 9, 10, 11, 12,
13, 14, from left to right. When the switch is set to On, these addresses are
reversed.
Note: This setting, On, is not supported in a 2104 Model TU3 or 2104 Model
DU3.
Orientation switch 8
This switch should be set to Off in a 2104 Model DU3, and to On in a 2104
Model TU3. Its setting determines the position of the Power and Check lights
on the 2104.
SCSI Bus Split switch 9
This switch controls the SCSI bus configuration. When the switch is set to Off,
the 2104 is configured as a single SCSI bus. When the switch is set to On, the
2104 is configured as a dual (or split) SCSI bus. In a 2104 Model DU3, with
this switch set to On and the SCSI address switch set to Off, the SCSI
addresses of the disk drives are 0, 1, 2, 3, 4, 5, 6, from left to center, on one
SCSI bus, and 8, 9, 10, 11, 12, 13, 14, from center to right, on the other SCSI
bus.
The default logical setting for this switch is Off.
Reserved 10
This switch should be set to Off.
Chapter 1. Using the 2104 Model DU3 or TU3 19