Hi,
Regarding your question, there isn't an option to vault from the GUI yet. There is an "Unvault" column which will allow unvaulting cartridges but this will only appear when there are cartridges to unvault.
To vault a cartridge the application will have to move the cartridge to an I/E port
The other option to vault would be to use the following command
/quadstorvtl/bin/vcconfig --modify --vtl=<vtl name> --label=<vcartridge label> --vault
Other options can be got from the command
/quadstorvtl/bin/vcconfig -h