This works for both linux ISO and vdisk.
But the global control plugin only take affect when you boot vdisk file by Ventoy.
If you use vdiskchain, you can add VTOY_LINUX_REMOUNT=1 kernel command line in the OS inside the vdisk file.
These are the steps for fedora (other distros should be similar)
1. edit /etc/default/grub add VTOY_LINUX_REMOUNT=1 to GRUB_CMDLINE_LINUX
2. run grub2-mkconfig -o /boot/efi/EFI/fedora/grub.cfg in the teminal.
But the global control plugin only take affect when you boot vdisk file by Ventoy.
If you use vdiskchain, you can add VTOY_LINUX_REMOUNT=1 kernel command line in the OS inside the vdisk file.
These are the steps for fedora (other distros should be similar)
1. edit /etc/default/grub add VTOY_LINUX_REMOUNT=1 to GRUB_CMDLINE_LINUX
2. run grub2-mkconfig -o /boot/efi/EFI/fedora/grub.cfg in the teminal.