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, 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.
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.
Procedure
To power off a node canister, complete the following steps:
-
Determine volume dependencies for the node canister that you are shutting down. For more
information, see Procedure: Understanding system volume dependencies.
-
Go to the service assistant for the node with the canister to shut down.
-
On the home page, select the node canister to shut down.
-
If you are working on a maintenance procedure, complete the following steps to ensure that you
have identified the correct node canister.
-
Go to the Node Details panel in the service assistant.
-
Select the Node tab; then, make a note of the last 6 digits that appear
in the Part Identity field.
-
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 |
|
-
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.
-
Use the Power off action to power off the canister.
-
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.