Fail Over A Controller Using The Cli; Determine The Operating State Of The Controllers Using The Gui; Determine The Operating State Of The Controllers Using The Cli; Expander Maintenance - HPE Nimble Storage HF Series Hardware Manual

Fail Over a Controller Using the CLI

A failover switches management of the array from the active controller to the standby controller.
Before you begin
Failover requires one controller to be in Active mode and the other controller to be in Standby mode.
Procedure
1. Determine the name of the array.
array --list
The name of the array appears in the list.
2. Perform the failover.
failover --array array_name
During the failover operation, the standby controller first goes into Solo mode, and then into Active mode. The active
controller goes into Unknown mode, then into Stale mode, and finally into Standby mode.
Example
$ failover --array datamaster-a

Determine the Operating State of the Controllers Using the GUI

Procedure
1. In the GUI, choose Hardware.
2. Click the link of the array you want.
3. Look for Controller A or Controller B.
4. Check the operating state of each controller.
One controller should be in Active mode and the other in Standby mode.

Determine the Operating State of the Controllers Using the CLI

Procedure
List the controllers.
ctrlr --list
A list of controllers appears with information including their operating states.
One controller should be in Active mode and the other in Standby mode.

Expander Maintenance

If an expander fails, or any component on an expander fails, such as the fans, replace the entire expander.

Replace an Expander

Use this procedure to replace an expander in your expansion shelf.
Before you begin
Time required:
Parts required:
15 minutes per expander (Do not exceed 15 minutes to avoid overheating.)
Replacement expander ordered from HPE
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Maintenance Procedures 97