Dell PowerFlex Appliance with PowerFlex 4.x Administration Guide

Enter maintenance mode

Use this procedure to enter maintenance mode using PowerFlex Manager.

1. Log in to PowerFlex Manager.
2. On the menu bar, click Block > SDSs.
3. In the list of SDSs, select the relevant SDS and click More Actions > Enter Maintainence Mode.
4. In the Enter SDS into Maintenance Mode dialog box, select one of the following options:
   • Instant - A node is temporarily removed without building a new copy of the data. During maintenance, the system only mirrors new writes. After maintenance is complete, the system applies the new writes to the node that was under maintenance.
   • Protected - A third copy is created before entering maintenance mode. This ensures that if there is a node failure where the second copy of SDS is required, there is still a full backup of the SDS. This leaves no room for discrepancy between the copies. More storage capacity from the node is required.
5. Click Enter Maintenance Mode.
6. Verify that the operation has finished successfully and click Dismiss.
7. Click Running Jobs and check the progress of protected maintenance mode.