Dell PowerStore Power Down and Reboot Procedures Guide

Power control procedure considerations

Note the following before you get started:

• Powering off a node, appliance, or cluster can take several minutes to complete.
• In a true emergency power off situation, turn the cabinet power switches to the off position to immediately remove power from the all cabinet components.
• Working with hardware may cause electrostatic discharge that could damage your hardware. Before working with any hardware, take precautions around handling replaceable units. See Safety precautions for handling replaceable units.
• If you are relocating or replacing hardware, to help identify associated enclosures when you are ready to cable and power on:
  • Ensure that you make a note of the cabling between enclosures and the appliances. If you used cable labels at the time of initial installation, reconnecting the cables is easier.
  • Ensure that you also record the Dell Service Tag of each enclosure in your cluster.
• Nodes in the appliance power on into the same mode they were in before the appliance was powered off. If a node powers on in service mode:
  1. Log in to the appliance from an SSH client.
  2. Run the svc_rescue_state clear command to clear the boot mode.
  3. Run the svc_node reboot command to reboot the node. Once rebooted, the node returns to normal mode.
  For more information about the service scripts, see the PowerStore Service Scripts Guide.
• If both nodes in an appliance reboot in service mode, always return Node A to normal mode first to avoid management software conflicts. After Node A is operating normally, you can return Node B to normal mode.
• Before powering down an appliance with metro volumes, ensure that the role of the metro volumes on the appliance are all set to nonpreferred. For information about setting metro volume roles, see the Protecting Your Data guide.