boot 2011.08.19 installation media from grub2 via loopback [SOLVED]

graysky · 2012-01-31 20:09:30

Not wanting to necrobump this old thread, I opted to ask the question again here. Has anyone successfully booted the arch iso (recovery purposes) from a grub or grub2 menu? I added the following to my /boot/grub/grub.cfg but it errors out on me and doesn't boot. Advice is appreciated.

menuentry "Archlinux-2011.08.19-netinstall-x86_64.iso" {
set isofile="/archives/archlinux-2011.08.19-netinstall-x86_64.iso"
loopback loop (hd0,7)$isofile
linux (loop)/arch/boot/x86_64/vmlinuz boot=arch findiso=$isofile
initrd (loop)/arch/boot/x86_64/archiso.img
}

Here is the error after booting:

Decompressing Linux... Parsing ELF... done.
Booting the kernel.
ash: closing paren expected
:: Starting [udev]
:: Triggering uevents...done.
:: Running Hook [memdisk]
:: Running Hook [archiso]
:: Running Hook [archiso_pxe_nbd]
:: Running Hook [archiso_loop_mnt]
:: Waiting for boot device...
Waiting 30 seconds for device /dev/disk/by-label/ ...
ERROR: boot device didn't show up after 30 seconds...
   Falling back to interactive prompt
    You can try to fix the problem manually, log out when you are finished
sh: can't access tty: job control turned off
[ramfs /]#

Last edited by graysky (2012-02-03 14:41:41)

djgera · 2012-02-01 13:27:17

archisolabel=ARCH_201108 img_label=%FS_LABEL_WHERE_ISO_IS_LOCATED% img_loop=/%PATH_TO_ISO_ON_FS_LABEL%/archlinux-2011.08.19-netinstall-x86_64.iso earlymodules=loop

earlymodules=loop, is just a workaround for 2011.08.19.

graysky · 2012-02-01 21:33:14

djgera wrote:

archisolabel=ARCH_201108 img_label=%FS_LABEL_WHERE_ISO_IS_LOCATED% img_loop=/%PATH_TO_ISO_ON_FS_LABEL%/archlinux-2011.08.19-netinstall-x86_64.iso earlymodules=loop

earlymodules=loop, is just a workaround for 2011.08.19.

Thanks for the reply. I'm a little confused, can you spoon feed me

Your advice:
archisolabel=ARCH_201108
img_label=%FS_LABEL_WHERE_ISO_IS_LOCATED%
img_loop=/%PATH_TO_ISO_ON_FS_LABEL%/archlinux-2011.08.19-netinstall-x86_64.iso earlymodules=loop

My entry for grub2:
menuentry "Archlinux-2011.08.19-netinstall-x86_64.iso" {
set isofile="/archives/archlinux-2011.08.19-netinstall-x86_64.iso"
loopback loop (hd0,7)$isofile
linux (loop)/arch/boot/x86_64/vmlinuz boot=arch findiso=$isofile
initrd (loop)/arch/boot/x86_64/archiso.img
}

djgera · 2012-02-01 22:50:58

just set the "linux" command right:

linux (loop)/arch/boot/x86_64/vmlinuz archisolabel=ARCH_201108 img_label=%FS_LABEL_WHERE_ISO_IS_LOCATED% img_loop=$isofile earlymodules=loop

Just change img_label= to match your fs-label, if this is not set, set to any valid value.

graysky · 2012-02-02 21:38:18

@djgera - thanks for the suggestion. Here is what I have but I still get the error described above:

menuentry "Archlinux-2011.08.19-netinstall-x86_64.iso" {
set isofile="/archives/archlinux-2011.08.19-netinstall-x86_64.iso"
loopback loop (hd0,7)$isofile
linux (loop)/arch/boot/x86_64/vmlinuz archisolabel=ARCH_201108 img_label=data img_loop=$isofile earlymodules=loop
initrd (loop)/arch/boot/x86_64/archiso.img
}

djgera · 2012-02-02 22:37:40

same error? Is not possible...

how looks parsed cmdline?
execute:

cat /proc/cmdline
blkid
ls -l /dev/disk/by-label

graysky · 2012-02-03 09:06:58

<<< Posted removed by author >>>

Last edited by graysky (2012-02-03 14:41:21)

djgera · 2012-02-03 13:29:13

Not of your system...

Anyway now I remember that img_label= is not suported in 2011.08.19, I implemented this one month later, so use img_dev=/dev/sda7 instead.

PS: I suggest to use latest testiso http://releng.archlinux.org

Last edited by djgera (2012-02-03 13:29:31)

graysky · 2012-02-03 14:41:02

Success! Thanks!

menuentry "Archlinux-2011.08.19-netinstall-x86_64.iso" {
set isofile="/archives/archlinux-2011.08.19-netinstall-x86_64.iso"
loopback loop (hd0,7)$isofile
#linux (loop)/arch/boot/x86_64/vmlinuz boot=arch findiso=$isofile
linux (loop)/arch/boot/x86_64/vmlinuz archisolabel=ARCH_201108 img_dev=/dev/sda7 img_loop=$isofile earlymodules=loop
initrd (loop)/arch/boot/x86_64/archiso.img
}

I updated the wiki: https://wiki.archlinux.org/index.php/GR … From_Grub2

djgera · 2012-02-03 14:53:28

Great!

Arch Linux

#1 2012-01-31 20:09:30

boot 2011.08.19 installation media from grub2 via loopback [SOLVED]

#2 2012-02-01 13:27:17

Re: boot 2011.08.19 installation media from grub2 via loopback [SOLVED]

#3 2012-02-01 21:33:14

Re: boot 2011.08.19 installation media from grub2 via loopback [SOLVED]

#4 2012-02-01 22:50:58

Re: boot 2011.08.19 installation media from grub2 via loopback [SOLVED]

#5 2012-02-02 21:38:18

Re: boot 2011.08.19 installation media from grub2 via loopback [SOLVED]

#6 2012-02-02 22:37:40

Re: boot 2011.08.19 installation media from grub2 via loopback [SOLVED]

#7 2012-02-03 09:06:58

Re: boot 2011.08.19 installation media from grub2 via loopback [SOLVED]

#8 2012-02-03 13:29:13

Re: boot 2011.08.19 installation media from grub2 via loopback [SOLVED]

#9 2012-02-03 14:41:02

Re: boot 2011.08.19 installation media from grub2 via loopback [SOLVED]

#10 2012-02-03 14:53:28

Re: boot 2011.08.19 installation media from grub2 via loopback [SOLVED]

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