The SAN Volume Controller node uses battery power from the uninterruptible power supply to shut itself down.
The Power failure display shows that the SAN Volume Controller is
running on battery power because main power has
been lost. All I/O operations have stopped. The node is saving cluster
metadata
and node cache data to the internal disk drive. When the progress
bar reaches
zero, the node powers off.
Note: When input power is restored to the uninterruptible
power supply,
the SAN Volume Controller turns
on without the front panel power button being pressed.
