With the release of firmware version 12.1.0 SonicWall will be shipping new devices with this version. Version 12.1.0 has the capability to re-image a device with any of the supported firmware versions.
To re-image an appliance from 12.1.0 to 11.4.0, the administrator can perform as below:
This feature was implemented to better assist customers while downgrading their appliance firmware version from 12.1.0 to 11.4.0.
For systems running 12.0.1 upgrade the system to 12.1.0 before downgrading to 11.4.0. 12.0.1 was supposed to support this downgrade but 12.0.1 downgrades to 11.4.0 are not recommended.
NOTE: in 11.4.0 the system will have no configuration and will need to be taken thru normal initial configuration.