[arch-releng] Loop iso booting

[Mr Green]

Just had a friend of mine who was having issues with loop mounting. We
ship with archiso_loop_mnt but being an vaft formatted device he
needed to add MODULES="nls_iso8859-1" to mkinitcpio.conf.

Thought I would try for myself and once I had got LABEL set on device,
booted via grub.

Only to be dropped to reduced shell as it could not find aitab?

grub.cfg

set timeout=10
set default=0

menuentry "Archbang 2014.05.01 (x86_64)" {
  set FILE=/boot/isos/archbang-rc-2014.05.01-x86_64.iso
  loopback loop $FILE
  linux (loop)/arch/boot/x86_64/vmlinuz img_loop=$FILE
img_dev=/dev/disk/by-label/ARCHBANG archisolabel=ARCHBANG
archisobasedir=arch
  # for Vesa mode... add: xorg=visa nomodeset
  initrd (loop)/arch/boot/x86_64/archiso.img
}

This is config I found on Archlinux forums, not that much information
in wiki (that I could find)

Is the config incorrect? Are there are problems related to loop?

MrG