Follow this procedure exactly when powering off the storage system.
CAUTION:
Except in an
emergency, do not turn off the PDU breakers before turning off the power to the
system. The system reacts as a power failure occurred and uses the cache backup
batteries to keep the cache active until the data in the cache is transferred to the
cache backup flash memory. When the cache backup batteries discharge power, the
power-on time can be prolonged by the amount of charge remaining in the batteries.
Fully discharged batteries take 90 minutes to charge.
Note: The control panel includes a safety
feature to prevent the storage system power from being turned on or off
accidentally. The PS power ON/OFF switch does not work unless the ENABLE switch is
moved to and held in ENABLE while the power switch is moved to ON or OFF.
- Confirm all maintenance and software-specific shutdown procedures have been completed.
- Verify all I/O activity to the storage system has stopped. You can vary paths offline and shut down the attached hosts.