Starting in Nodegrid OS 5.2, there is the option to format the hard disk as part on the install process.  Since this will will erase all configurations and logging, it is only recommended as a last resort in troubleshooting or when a clean start is desired.  After the install with format is completed, the system will revert to factory defaults with the default credentials and will need to be reconfigured.  There are two methods for this:

Remote access method:

- Starting version must be NG 5.2 or newer.

- Target version can be any version.

From System :: Toolkit :: Software Upgrade, select 'Format partitions before upgrade. This will erase current configuration and user partition.' before clicking Upgrade.

Physical access method:

- Starting version can be any version.

- Target version must be NG 5.2 or newer.

Using the process described in the article Nodegrid Boot from USB media article, select 'Install Nodegrid formatting disk' when presented with the install options menu during the boot from USB.