Mount ISO as specific device (ie: /dev/sda1) with GRUB2 to boot KNOPPIX live cd iso

BLuFeNiX · 12-22-2009, 02:54 PM

I'm trying to make grub2 boot a bitdefender rescue cd (knoppix based). During the boot up it tries to find where the cd is mounted (it checks a bunch of devices like /dev/sda1), but fails.

here is my grub.cfg:

Code:

menuentry "Bitdefender Rescue CD" {

    set isofile="/boot/iso/bitdefender_rescue.iso"

    loopback loop $isofile

    set gfxpayload=1024x768x16,1024x768

    linux (loop)/boot/isolinux/linux ramdisk_size=131072 init=/etc/init lang=us apm=power-off nomce loglevel=0 quiet BOOT_IMAGE=KNOPPIX

    initrd (loop)/boot/isolinux/minirt.gz

}

I get a message that KNOPPIX filesystem cannot be found and it drops me to a limited shell.

how would I change grub.cfg to mount the loopback to /dev/sda1? (or any directory for that matter)

I'm also not sure about the "BOOT_IMAGE=KNOPPIX" part, but I'll fix that next.

linus72 · 12-22-2009, 04:35 PM

knoppix cheatcode

Quote:

boot=/dev/hda1
(after you load kernel and run ramdisk startup stuff (minirt.gz) however you may choose)
Then continue starting up from hda1/KNOPPIX/KNOPPIX . This is an easy way to free up your CD drive--you don't even need the CD at all, to boot, if you boot using loadlin, and have the 'linux' file and 'minirt.gz' file being loaded from the hard drive with loadlin. just copy the cd compressed contents to the root directory of a partition. then load knoppix with loadlin or however, passing this code in addition to the others, as you start up.
This was tested to work on a fat32 partition, in knoppix 3.4. --gh78 May 20 2006

from here

http://www.knoppix.net/wiki/Cheat_Codes

Look at all this
http://www.knoppix.net/forum/viewtopic.php?t=11796

http://www.linuxquestions.org/questi...d-disk-294744/

http://www.experts-exchange.com/OS/L..._24820743.html

http://www.knoppix.net/forum/viewtop...=121620#121620

http://www.knoppix.net/forum/viewtop...?p=99669#99669

http://www.knoppix.net/forum/viewtop...?p=98279#98279

BLuFeNiX · 12-23-2009, 01:31 AM

I tried a bunch of different cheat codes and grub commands--to no avail. One interesting thing I read in one of those linked pages was that the KNOPPIX filesystem had to be on a different partition, so I copy the KNOPPIX folder from the iso on the first thumb drive, onto another thumb drive and have it present during boot. here's what happens:

Code:

Welcome to KNOPPIX CD RESCUE!
booting kernel 2.x.y!
checking for usb devices.
...
checking for KNOPPIX filesystem in:
/dev/hda1
/dev/hda2
/dev/hda3
...
...
/dev/sda1
FOUND IN /dev/sda2

Welcome to KNOPPIX CD RESCUE!
booting kernel 2.x.y!
checking for usb devices.
...
checking for KNOPPIX filesystem in:
/dev/hda1
/dev/hda2
/dev/hda3
...
...

could not find KNOPPIX filesystem...

??? It loads itself and then fails to find itself again... I am thoroughly confused, as I do not know much about the linux boot process.

Any ideas?