Hi all,
I make a Live persistence on a hdd partition.
It is actually Raw on FAT32 for Live part and EXT4 for persistence data part.
I think convert from FAT32 to EXT4 for Live part would make it run faster.
EXT4 is faster than FAT32 right, although most of the base system is actually on squashfs?
So I convert Live FAT32 to EXT4.
Now system not boot at all, only to Grub rescue, where it can not recognize EXT4 partition.
I digging the google, also come across this thread with no help https://ubuntuforums.org/showthread.php?t=1380886&p=8666605#post8666605
I digging the Grub rescue prompt and discover that bootx64.efi not load ext4 driver.
I try to patch the bootx64.efi and lead to these step to the success:
- Recreate memdisk and config file
$mkdir memdisk
$nano memdisk/boot/grub/grub.cfg
search --file --set=root /.disk/info
set prefix=($root)/boot/grub
source $prefix/x86_64-efi/grub.cfg
$tar -cvf memdisk.tar -C memdisk .
- Recreate bootx64.efi with EXT4 support
$nano embeded.cfg
insmod normal
set root=(memdisk)
set prefix=($root)/boot/grub
source $prefix/grub.cfg
$grub-mkimage -o bootx64.efi -O x86_64-efi fat iso9660 part_gpt part_msdos \
normal boot linux configfile loopback chain efifwsetup efi_gop efi_uga \
ls search search_label search_fs_uuid search_fs_file gfxterm gfxterm_background \
gfxterm_menu test all_video loadenv memdisk ext2 tar -m memdisk.tar -c embeded.cfg
- copy the bootx64.efi to your /efi/boot folder
Voila your EXT4 Live partition now boot as if a RAW iso image
I include the created bootx64 herein so you can just copy it to you ESP/EFI and boot any ext4 LiveUSB/CD
Regards