Home > Storage > PowerScale (Isilon) > Product Documentation > Management and Migration > Dell PowerScale: Non-Disruptive Upgrade Best Practices > Pause and resume
Starting from OneFS 8.2.0, a OneFS upgrade can be paused and resume. This usually happens when customers reach the end of a maintenance window and they can pause the upgrade and resume in a later window. To pause a running OneFS upgrade process, run the following command:
isi upgrade pause
After this command is triggered, upgrade status will be in a Pausing status until the current upgrading node is completed. The remaining nodes will not be upgraded until the upgrade process is resumed.
To resume a paused OneFS upgrade process, run the following command:
isi upgrade resume
To check the Pausing/Paused status, use the following CLI command:
isi upgrade view
Or, to view the PAUSE file data by using the following command:
cat /ifs/.ifsvar/upgrade/processes/upgrade/PAUSE
A typical output which indicates the PowerScale cluster is still in pausing status is as below:
{
“PauseState”: “Pausing”
}