Booting from USB flash in Virtualbox

I have a knoppix USB bootable flash that I can boot PC from it correctly. I want to boot it in VirtualBox.
So I created a disk by:

Code:

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VBoxManage internalcommands createrawvmdk -filename mydisk.vmdk -rawdisk /dev/sdc

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Then I created a new virtual machine and used mydisk.vmdk as existing disk. When I boot virtual machine, it shows error:

Code:

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    Waiting (USB)...
    Waiting (USB)...
    Waiting (USB)...
    Waiting (USB)...
    Could not mount disk to /mnt-system. Starting debugging shell...
    sh: can't access tty: job control turned off.
    / #

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Sometimes Knoppix has difficulties to find the folder '/mnt/system' immediately if you use an USB-device; therefore it starts to look if there are other devices with this folder. In your case you can influence the start of Knoppix using the cheatcode

Code:

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knoppix fromhd=/dev/sda1

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Now Knoppix will only search for this folder at '/dev/sda1'.

You can use Micro-Remastering to have this cheatcode fromhd=/dev/sda1 permanent within your flash disk installation.

My USB doesn't have syslinux.cfg but it has boot/isolinux/isolinux.cfg:

Code:

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DEFAULT knoppix
APPEND ramdisk_size=100000 lang=en apm=power-off initrd=minirt.gz nomce libata.force=noncq hpsa.hpsa_allow_any=1 loglevel=1 tz=localtime
TIMEOUT 0
# TOTALTIMEOUT 0
# KBDMAP german.kbd
PROMPT 1
F1 boot.msg
F2 f2
F3 f3
DISPLAY boot.msg
LABEL knoppix
KERNEL linux
APPEND ramdisk_size=100000 lang=en apm=power-off initrd=minirt.gz nomce libata.force=noncq hpsa.hpsa_allow_any=1 loglevel=1 tz=localtime no3d wheelmouse

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Where should I change? Where should I put fromhd=/dev/sdc1? Should I recreate vmdk from sdc1 instead of sdc?

Quote:

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VBoxManage internalcommands createrawvmdk -filename mydisk.vmdk -rawdisk /dev/sdc

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Quote:

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My USB doesn't have syslinux.cfg but it has boot/isolinux/isolinux.cfg:

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Are you sure you has removed the Knoppix CD/DVD within VirtualBox? Isolinux is the bootloader for CDs.

Quote:

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I have a knoppix USB bootable flash

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I supposed, you had done a "Flash disk install". Please tell us what kind of Install you really did.

Your

Code:

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VBoxManage internalcommands createrawvmdk -filename mydisk.vmdk -rawdisk /dev/sdc

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is correct, if the USB device is the 3.rd device within your Host system. Within VirtualBox - the Guest system - the USB device is the 1.st device. Therefore you have to use cheatcode fromhd=/dev/sda1 (not sdc1).

Quote:

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I supposed, you had done a "Flash disk install". Please tell us what kind of Install you really did.

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My friend gave me this bootable USB flash. I can boot PC by it but I want to use it in VirtualBox. I don't know how this is created? Can I realize it?

Connect within VirtualBox your mydisk.vmdk with SATA controller port 0 and let IDE controller port 0 empty (without Knoppix CD/DVD). Can you boot without the cheatcode? If not, try to boot with the cheatcode I've told you in the other posting. What happens?.

Without cheat code, the same error is shown which I've told you.
I changed isolinux.cfg to:

Code:

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DEFAULT knoppix fromhd=/dev/sda1
APPEND ramdisk_size=100000 lang=en apm=power-off initrd=minirt.gz nomce libata.force=noncq hpsa.hpsa_allow_any=1 loglevel=1 tz=localtime
TIMEOUT 0
# TOTALTIMEOUT 0
# KBDMAP german.kbd
PROMPT 1
F1 boot.msg
F2 f2
F3 f3
DISPLAY boot.msg
LABEL knoppix fromhd=/dev/sda1
KERNEL linux
APPEND ramdisk_size=100000 lang=en apm=power-off initrd=minirt.gz nomce libata.force=noncq hpsa.hpsa_allow_any=1 loglevel=1 tz=localtime no3d wheelmouse

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but the same error is shown.

There ist something wrong with your friends USB flash if you have "isolinux.cfg". I suggest you create an USB install by yourself following Flash disk install.