Crash-proof Backup: ISO wird nicht gefunden

[megavolt]

Ich habe im Englischen Teil geschrieben, wie ich das mache:

@megavolt

I have a backup OS, which is just a customized Manjaro ISO and I don’t use a flash drive for this.

1. Make some space on sdc and create a 10GB vfat partition and flag it with boot,esp and name the partition and file system “RECOVERY” ( important ).
2. Mount it and install grub on it:

sudo mount --mkdir --label RECOVERY /mnt/recovery
sudo grub-install --target=x86_64-efi --recheck --removable --efi-directory=/mnt/recovery --boot-directory=/mnt/recovery/boot --verbose --force

3. Create an efi entry in your UEFI/BIOS:

 sudo efibootmgr --create --disk /dev/sdX --part <number> --label "Recovery" --loader '\EFI\BOOT\BOOTX64.EFI'

4. Copy a Manjaro ISO to that partition:

sudo cp -f /path/to/manjaro.iso /mnt/recovery/manjaro.iso

5. This script has to be in /mnt/recovery/boot/grub/grub.cfg (create it):

function load_video {
  if [ x$feature_all_video_module = xy ]; then
    insmod all_video
  else
    insmod efi_gop
    insmod efi_uga
    insmod ieee1275_fb
    insmod vbe
    insmod vga
    insmod video_bochs
    insmod video_cirrus
  fi
}

if loadfont $prefix/fonts/unicode.pf2 ; then
  # Set Video
  set gfxmode=auto
  load_video
  insmod gfxterm
  # Set Langauge for grub
  set locale_dir="$prefix/locale"
  set lang="de"
  insmod gettext
fi

# Set keyboard language for grub
#insmod keylayouts
#keymap $prefix/lang.gkb

terminal_input console
terminal_output gfxterm

insmod part_gpt
insmod part_msdos
insmod fat
set label="RECOVERY"
search --no-floppy --label --set=root $label
insmod png

set timeout_style="menu"
set timeout="10"

menuentry "Manjaro ISO"  {
    # Setup grub
    load_video
    set gfxpayload=keep
    insmod part_gpt
    insmod part_msdos
    insmod fat

    ## Set Parameters for the ISO
    # Set the free or nonfree drivers
    set dri="free"
    # Set the language of the Desktop (localectl list-locales)
    set lang="de_DE"
    # Set keyboard language (localectl list-keymaps)
    set keyboard="de"
    # Set the timezone (timedatectl list-timezones)
    set timezone="Europe/Berlin"
    # Copy to RAM (needs at least 8GB RAM)
    #set c2r="copy2ram"

    # Set Params searching the ISO
    # Label of the partition where it searches for the iso file
    set label="RECOVERY"
    # Search for the partition label and switch to the root directory of it
    search --no-floppy --label --set=root $label
    # Set the device where the ISO is located
    set device="/dev/disk/by-label/$label"
    # Set the Path to the ISO
    set file="/manjaro.iso"

    loopback loop $file
    linux  (loop)/boot/vmlinuz-x86_64  img_dev=$dev img_loop=$file driver=$dri tz=$timezone lang=$lang keytable=$keyboard $cr2
    initrd (loop)/boot/intel_ucode.img (loop)/boot/initramfs-x86_64.img
}

6. And now you are done. You can now reboot, type F12 and choose “Recovery” from the Bootmenu. This little installation is fully dedicated and even work when your main installation is non-functional. You can also do a full installation form here.

You need to adjust the parameter in menu to your language. Parameters are mostly explained. If you have an amd CPU, then replace intel_ucode.img with amd_ucode.img.

Anyway, this works for me in production and if something goes wrong, I can always boot a live session and fix stuff.

Das funktioniert für mich. Was ich bei deinem Menüeintrag vermisse, ist das Setzen der Wurzel, wie bei mir:

search --no-floppy --label --set=root $label

Was in dem Fall nach dem Label “RECOVERY” sucht und für diese Partition das Root setzt, was im Menüeintrag drin ist. Die erwähnte Anleitung ist auch schon alt und wahrscheinlich nicht fehlerfrei. Würde dir eine separate EFI-Partition für solche Späße aus Erfahrung empfehlen und auch für die ISOs verwenden (wenn nicht größer als 4GB).