When installing a dedicated R81 SmartEvent server.

At least 20GB is the recommended size of the root partition when installing a dedicated R81 SmartEvent server. The root partition is the primary partition that contains the operating system files and other essential files for booting and running the system. The SmartEvent server requires at least 20GB of free space on the root partition to install and operate properly. If the root partition size is less than 20GB, you may encounter errors or performance issues with SmartEvent. References: Check Point Security Expert R81 Course, SmartEvent Administration Guide