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Disk Drive Status Lights
To identify the lights that are described here, see Figures 3 and 4.
These 16 green status lights 4 are related to the disk drive modules that are
contained in the 7133. The upper row of eight lights represents, from left to right, the
front disk drive modules, 1 through 8. The lower row represents, from right to left, the
back disk drive modules, 9 through 16.
Each status light shows the following conditions:
Status of Light
Off
Permanently on
Slow flash (two seconds on,
two seconds off)
Fast flash (five times per
second)
Controller Card Light
To identify the light that is described here, see Figures 3 and 4.
Controller Card Check light 7 : This light comes on if the controller card fails. It can
be seen only when the front cover is open.
Fan Assembly Lights
To identify the lights that are described here, see Figures 3 and 4.
Fan Power light 8 : This green light is on when dc voltage is present at the fan.
Fan Check light 9 : This amber light comes on and stays on if the fan fails.
The fan assembly lights can be seen only when the front cover is open.
12
7133 Models D40 and T40 Service Guide
Meaning
Both SSA links are inactive because one of the following conditions
exists:
v The disk drive modules, dummy disk drive modules, or module
and SSA attachment that are logically next to this module are not
connected or are missing.
v A dummy disk drive module is present in this position.
v The disk drive modules or module and SSA attachment that are
logically next to this module are inactive.
v An SSA attachment that is in the loop is inactive.
v A power-on self-test (POST) is running on this disk drive module.
Both SSA links are active, and the disk drive module is ready to
accept commands from the using system. The Ready light does not
show that the motor of the disk drive module is running. The
module might be waiting for a Motor Start command, or might have
received a Motor Stop Command.
Only one SSA link is active.
The disk drive module is active with a command in progress.
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