Ubuntu – How do you use persistence in UEFI mode

live-usbpersistenceuefi

When booting a LiveUSB into UEFI mode, persistence is not available. When booting into legacy mode, it works fine. why? And how may I resolve this?

Best Answer

The easiest way to create USB Live CD with persistence is to manually form the partitions using GParted.

This is what I've done:

  • Format your USB with GPT partition table (though, I believe MBR should work fine as well).
  • Create two partitions. First is for ISO files and it should be FAT32 (~1100MB for Ubuntu 14.04). Second is for persistence and it should be ext4 with label casper-rw.
  • Copy files from your ISO (including hidden) to USB FAT32 partition.
  • Edit boot/grub/grub.cfg and just add the word persistent (This is the reason why persistence doesn't work for you in UEFI mode.):

menuentry "Start Kubuntu" {
set gfxpayload=keep
linux /casper/vmlinuz.efipersistentfile=/cdrom/preseed/kubuntu.seed boot=casper maybe-ubiquity quiet splash --
initrd /casper/initrd.lz
}

It might be a little slow when you first start it especially if you use USB2.0.

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