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: After powering off a node canister using this procedure, a physical reseat of the canister will be required to power it back on. The reseat procedure requires physical access to the enclosure, as described in Reseating a node canister in the control enclosure.

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.

If your system is powered on and doing I/O operations, it is important that the system is powered 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.

Procedure

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

  1. Go to the service assistant for the node with the canister to shut down.
  2. On the home page, select the node canister to shut down.
  3. If you are working on a maintenance procedure, complete the following steps to ensure that you have identified the correct node canister.
    1. Go to the Node Details panel in the service assistant.
    2. Select the Node tab; then, make a note of the last 6 digits that appear in the Part Identity field.
    3. Select the Hardware tab. Then, take note of the values in the Canister Location (slot), Machine Type and Model, and Serial Number fields.
      Table 1 summarizes the information that can help you identify the correct node canister.
      Table 1. Information to identify a node canister
      Tab Field name Node canister value
      Node Part Identify  
      Hardware Canister Location (slot)  
      Machine Type and Model  
      Serial Number  
    4. To activate the identify indication on the node canister, you can also click the Identify button. The fault LED indicator on the node canister blinks so that you can confirm its location.
  4. Use the Power off action to power off the canister.
  5. After the node is powered off, the service assistant shows that the node status is offline. The status LED indicators on the canister shows that the node is powered off.