Refer to Figure 13 to identify the switches on the switch card.
The switch card contains the following switches that are accessible to the operator.
Note:
The
″
default logical setting
″
of a switch is the setting that is used if the
switch card assembly is not present when the 2104 is switched on, or when
a reset operation occurs.
Power Control switch
1
When this switch is set to Off, the 2104 automatically switches off or on
when the using system is switched off or on.
When this switch is set to On, the 2104 is powered up or down by the DC
On/Standby switch on a fan-and-power-supply assembly.
The default logical setting for this switch is On.
Drive Autostart switch
2
The disk drive motors are controlled by the combination of this switch and
the Delay Motor Start Switch
5
.
When this switch is set to On, and the Delay Motor Start Switch
5
is set
to Off, the disk drive motors do not start until a START MOTOR command
is issued. The timing sequence of disk motor startup is under the control of
the using system software.
When this switch is set to Off, and the Delay Motor Start Switch
5
is set
to On, the disk drives are set to Delay Motor Start mode. The disk motor
startup delay time is different for each disk drive and is usually computed
Figure 13. Switch Card
Chapter 1. Using the 2104 Model DU3 or TU3
15
Summary of Contents for TU3 2104
Page 1: ...Expandable Storage Plus 2104 Models DU3 and TU3 Operator s Guide SA33 3310 03...
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Page 90: ...5 Push the lever down Figure 66 Closing the Lever 74 2104 Models DU3 and TU3 Operator s Guide...
Page 91: ...6 Tighten the thumbscrew Figure 67 Tightening the Thumbscrew Chapter 3 Exchanging FRUs 75...
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Page 134: ...Part Number 97P1458 Printed in the U S A SA33 3310 03 1P P N 97P1458...
