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List:       user-mode-linux-user
Subject:    Re: [uml-user] Issues using multiple ubd devices...
From:       Thomas Preissler <Preissler () internetx ! de>
Date:       2002-10-30 16:35:17
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Brett Kosinski schrieb am 30. October 2002:

> Hi!  I'm currently toying around with UML, and I've come across an 
> irritating problem.  I'm attempting to install Debian, and I have the 
> uncompressed root filesystem in one image, the drivers on another image, 
> and a formatted 1 gig hard drive image.  Now, I'm running UML as follows:
> 
> linux ubd0=root.bin ubd1=hd.bin ubd2=drivers.bin devfs=nomount \
>       root=/dev/ubd0
> 
> Now, the system boots and does it's usual thing.  However, here's where 
> things get wonky.  If I mount /dev/ubd0 manually, I get the root 
> filesystem as expected.  If I mount /dev/ubd1 or /dev/ubd2... I get the 
> root filesystem!  ie, /dev/ubd1 and ubd2 appear the same as /dev/ubd0.  
> And I know the contents of these images are different (just in case, I 
> mounted them all on the host system, and they were different :), and the 
> block devices on the guest are different (major 98, minor 0, 1, and 2).  
> I've even tried setting them up with mconsole, but I get the same 
> results.

As the scenario above, mounting ubd3, but no image is defined,
mounts the root-fs.

The funny thing is, when data are written, they does not appear in
the real root-fs.

> Anyway, here are the specs for what I'm running:
> 
> Guest: 
>   linux-2.4.19-5um
> 
> Host:
>   Redhat 7.3
>   linux-2.4.18-17.7.x

I have the same problem:

Guest: v2.4.19-17um

Host: SuSE 7.3
      2.4.10-4GB


Regards,
Tom


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