Activate new disk automatically as early as possible

I have a Gigabyte GC-Ramdisk (4GB) which regularly loses format when left overnight. (Despite new battery). I use it for temp and page files. Is there any way I can activate the disk automatically on boot (running diskpart possibly) preferably before logon. Ideally I'd like to run a script to format as well. If not possible before logon then where is the best startup location to trigger a...