I've had a go at getting UML running off a partition on the host system.
What I've done is:

- prepare it as an ext3 filesystem.
- mount it and debootstrap a debian base system into it.
- checked it works when you chroot to it.
- install the user-mode-linux debian package.
- run:

$ linux.uml mem=128M udb0=/dev/sda5 rootflags=rw
(also tried udba=/dev/sda5 root=/dev/sda5)

I keep getting the error:
VFS: cannot open root device "98:0" or unknown-block(98,0)
(There is a longer error log than this but there's a lot and it's
awkward to copy it from the machine I'm setting up on)

can anyone help with this?

cheers,

andy

Diego Ramos V. wrote:
>
>
> Yes, It's possible, I'm going to resend a mail which was sent for a 
> great friend Benedict Verheyen, follow the instructions and it works out,
>
> - make a new directory for instance: *mkdir /mnt/new*
> - mount the filesystem image on new directory *mount -o loop  
> filesystem_image /mnt/new
> - *Now you can copy any file into fileystem  *cp apache /mnt/new/home
> - *umount the filesystem* image
> - *run UML and install apache or any software, don't forget dependencies
> -
> Good Luck
>
> Diego R.


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