IBM TotalStorage, Installation Manual

Page: 61 / 91

Note: When input power is restored to the uninterruptible power supply, the SAN
Volume Controller is turned on without the front panel power button being
pressed.
Powering off
Figure 43 shows that the power button has been pressed and the node is powering
off.
The progress bar moves backward when the power is removed. The power-off
operation might take several minutes.
Restarting
Figure 44 shows that the software on a node is restarting.
The software is restarting either because:
v
An internal error was detected
v
A power-off operation was ended when the power button was pressed again
while the node was powering off
If a power-off operation was ended, the progress bar continues to move backward
until the node finishes saving its data. After the data is saved, the progress bar
moves forward during the restart operation.
Shutting down
Figure 45 on page 40 is an example of what the front panel indicator shows when
you issue a shutdown command to a SAN Volume Controller cluster or a SAN
Volume Controller node. The progress bar continues to move left until it is safe to
be powered off. When the shutdown operation is complete, all power will be
removed from the node. When power has been removed from the last node
connected to the uninterruptible power supply, the uninterruptible power supply
also will be shut down.
P o w e r F a i l u r e
Figure 42. Power failure display
P o w e r i n g O f f
Figure 43. Powering-off display
R e s t a r t i n g
Figure 44. Restarting display
Chapter 5. Using the front panel display on the SAN Volume Controller
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