Procedure: Powering off a node canister

To complete some service tasks, you must ensure that the node canister is powered off safely.

About this task

Attention: If your system is powered on and doing I/O operations, the system must power off correctly to ensure that no data is lost. If possible, always use the fix procedures that are presented by the management GUI to manage and maintain your system. The fix procedures ensure that the canister is powered off safely.

While a node canister is powered off, some volumes can become inaccessible. Refer to Procedure: Understanding system volume dependencies to determine whether it is appropriate to continue this procedure.

Procedure

To power off a node canister, complete the following steps:

  1. If you are powering off the node canister to add memory or changing an adapter that is used to communicate with another control enclosure in the system, select Monitoring > System Hardware. Right-click the node canister from the rear view of the enclosure and select Remove. This action uses the rmnode command to logically remove the node canister from the system, so it can be updated without causing problems.
  2. Go to the service assistant for the node with the canister to shut down.
  3. On the home page, select the node canister to shut down.
  4. If you intend to do maintenance of the node canister, click Identify to light the Identify LED on the canister. Confirm that you know the location of the node canister.
  5. Use the Power off action to power off the canister.
  6. After the node is powered off, the service assistant shows that the node status is offline. The status LED indicators on the canister show that the node is powered off.