1

Summary:

I want to create a bootable USB stick with a live Knoppix DVD iso on it, without first having to put the iso file on a DVD and boot it. However, it's not the latter proviso that is my problem.

So far, I have succeeded in putting the appropriate parts of the knoppix iso on a USB stick, and installing the grub (legacy) bootloader (ver 0.97) on the stick.

I put the stick in the slot, switch on the laptop, and the grub on the stick loads OK. But when I select the grub menu entry to launch the boot, I get the following error:

"Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0)"

and the boot goes no further.

The grub menu.lst entry is:

title KNOPPIX DVD on memory stick
root (hd0,0)
kernel /boot/isolinux/linux lang=en apm=power-off initrd=/boot/isolin
ux/minirt.gz nomce libata.force=noncq hpsa.hpsa_allow_any=1 loglevel=1

(The "kernel" entry is all on one line.)

The entry "root (hd0,0)" IS correct because when a stick is used to boot from, my system designates it as "root (hd0,0)".

MY QUESTION:

Please could you tell me why I'm getting the "Kernel panic", and how do I make the boot succeed?

Full details:

  1. To create the bootable USB stick with the live Knoppix DVD iso on it, I followed the instructions on the following site, as my MAIN BASE to work from (post #3, klaus2008):

http://knoppix.net/forum/threads/31759-Installing-KNOPPIX-7-6-0-DVD-iso-image-on-a-bootable-usb-stick#3

  1. Those instructions tell you to use the syslinux bootloader. But syslinux works with a FAT filesystem, which only supports files up to 4Gb (using FAT32). One of the files to be copied from the iso file on the hard drive to the stick is 4.3Gb (namely /KNOPPIX/KNOPPIX). And sure enough the copy failed.

  2. So I used the grub bootloader instead, and formatted the stick as ext3 (a single partition). I assumed that grub supports ext3. The 4.3Gb file now copied OK.

See "6." for how I put grub on the stick.

  1. But when booting the stick, I got the "Kernel panic" error in the "Summary".

From googling the "Kernel panic" message, there appear to be two main suggestions for correcting the problem: a) use another version of grub, or b) boot a different kernel.

I've tried the latter, but still get the same error. To be honest, I'M OUT OF MY DEPTH HERE, so your handholding guidance would be much appreciated.

  1. I ought to mention that when I created /boot/grub/menu.lst on the stick, I did the following.

I based menu.lst on what I believe is the equivalent entry in /boot/isolinux/isolinux.cfg on the stick. That isolinux.cfg entry is

LABEL knoppix
KERNEL linux
APPEND lang=en apm=power-off initrd=minirt.gz nomce libata.force=noncq hpsa.hpsa_allow_any=1 loglevel=1

(The "APPEND" entry is all on one line.)

So based on that, I created the following entry in menu.lst

title KNOPPIX DVD on memory stick
root (hd0,0)
kernel /boot/isolinux/linux lang=en apm=power-off initrd=/boot/isolin
ux/minirt.gz nomce libata.force=noncq hpsa.hpsa_allow_any=1 loglevel=1

(The "kernel" entry is all on one line.)

  1. I put grub on the stick in the following way:

$ sudo grub-install --root-directory=/media/sdb1 /dev/sdb
Installation finished. No error reported.
This is the contents of the device map /media/sdb1/boot/grub/device.map. Check if this is correct or not. If any of the lines is incorrect, fix it and re-run the script `grub-install'.

(fd0) /dev/fd0
(hd0) /dev/disk/by-id/ata-TOSHIBA_MK1059GSMP_Z1Q7P2H2T
(hd1) /dev/disk/by-id/usb-SanDisk_Cruzer_Edge_20035000721D97C341C9-0:0
$

I understand that the above command puts the grub bootloader in the MBR of the stick, and it put 10 files into /boot/grub/ on the stick.

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Browse other questions tagged or ask your own question.