[Grml] Grml via ipxe's sanboot

[Jens Mueller]

Dear list,

I'm trying to boot GRML over ipxe's sanboot. It fails when mounting
root:
Begin: Mounting root file system ...
(initramfs) Unable to find a medium containing a live file system

This is probably no surprise because sanboot is similar to booting using
memdisk but without a download delay.
mika wrote in "Booting ISO images from within GRUB2"
(http://michael-prokop.at/blog/page/3/)
"The good news is that Grml supports the memdiskfind/phram/mtdblock
approach out-of-the-box."
Meaning you do something like

modprobe phram phram=memdisk,$(memdiskfind)
modprobe mtdblock

as mentioned here http://www.syslinux.org/wiki/index.php/MEMDISK#Linux.
But memdiskfind returns nothing.

My ipxe config contains

:grmlsan
sanboot ${url}/iso/grml32-small_2014.03.iso || goto failed

Any hints to boot Grml over sanboot?

Jens