Dell PowerFlex Appliance with PowerFlex 4.x Administration Guide

Place storage data server in maintenance mode

Place an storage data server in maintenance mode to perform non-disruptive maintenance on the storage data server.

1. On the menu bar, click Block > SDSs.
2. In the list of storage data servers, select the relevant storage data server and click More Actions > Enter Maintenance Mode.
3. 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 storage data server is required, there is still a full backup of the storage data server. This leaves no room for discrepancy between the copies. More storage capacity from the node is required.
4. Click Enter Maintenance Mode.
5. Verify that the operation has finished and was successful, and click Dismiss.
6. Optionally, at the top right side of the toolbar, click the Running Storage Jobs icon to check maintenance mode status.