Replacing A Failed Power Supply On A Node; Step 1: Put The Node Maintenance Mode, Then Shut Down The Node - Hitachi Hyper Scale-Out Maintaining And Troubleshooting

Replacing a failed power supply on a node

Use maintenance mode to perform planned, temporary maintenance on a node.
When a node is in maintenance mode, the software is not performing automatic
rebalancing or file copy and migration activities to bring file protection in compliance with
the data protection policy set, which means data is at risk. The longer time a node is in
maintenance mode, the greater the chance of data loss. Therefore, placing a node in
maintenance mode will raise an alert that will not go away until the node is taken out of
maintenance mode.
A node that is put in maintenance mode can subsequently be shut down or rebooted
without triggering the storage subsystem to initiate data rebalancing. Also, if something
happens to delay a node being brought back online or has a catastrophic failure, an
administrator needs to be able to take a node that is DOWN out of maintenance mode so
that rebalancing and file protection activities are resumed.
Important: A minimum of five nodes is required for the cluster to function
properly and ensure high availability. Therefore, you cannot put a node in
maintenance mode if doing so would leave less than five nodes up and
running.

Step 1: Put the node maintenance mode, then shut down the node

Using the Management Console
1. Go to Hardware > Nodes.
2. On the Nodes page, point and click on the row in the list to select the node with the
failed power supply.
3. Right-click to display the context menu and select Set Maintenance Mode.
4. On the Nodes page, point and click on the node that you just put into maintenance
mode.
5. Right-click to display the context menu and select Shut Down.
6. Confirm that you want to shut down the node, by clicking OK.
Using the Command Line Interface
1. Logged in to the CLI as admin or other administrative user, run the hspadm command
to put the node with the failed power supply in maintenance mode. For example:
$ hspadm node edit --name Node007 --maintenance-mode y
2. Run the hspadm command to shut down the node with the failed power supply. For
example:
$ hspadm node shutdown --name Node007
Hyper Scale-Out Platform Supporting and Troubleshooting
Adding and replacing hardware components 19