Powering off and on local and external storage systems
You must temporarily halt Universal Volume Manager operations before powering off external storage systems. When the systems are powered on, you can resume all operations.
Steps in the procedures of this topic must be followed in this order:
When you power off the local and external systems, the local system must be turned off first before the external system.
When you power on both systems, the external system must be turned on first before the local system.
To power off both local and external storage systems
Stop read or write I/O operations to the local storage system.
Split all pairs using external volumes (pairsplit operation). For information on the pairsplit operation, see the user guide for the relevant software.
Confirm that the status of each external volume is Normal or Disconnect.
Power off the local storage system.
Only after the local system is completely powered off should you power off the external system.
To power on both local and external storage systems
Power on the external system.
After the external system is completely powered on, you can power on the local system.
Resume use of the mapped external volume.
Start read or write I/O operations to the local storage system.