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[dm-devel] Re: Partition tables on devices



	Hi Christophe,

On Thu, 21 Jun 2007, Christophe Saout wrote:
> > I have a disk that embeds another disk image (including a partition table and
> > partitions).  Using dmsetup and the linear target I created a new device to
> > access the embedded disk image. Cfdisk shows me the partitions on the new
> > device, but the kernel didn't scan for partitions and hence didn't created
> > devices for them.
> > 
> > Does there exist a way to let the kernel scan for partition tables on a device
> > created using dmsetup? Or should I use a script like the one proposed by
> > Christophe Saout in http://lkml.org/lkml/2003/7/18/141?
> 
> There's a small tool
> "kpartx" ( http://www.die.net/doc/linux/man/man8/kpartx.8.html ), which
> I think, IIRC is a simple port of the kernel partition detection code to
> userspace, which uses the device mapper to set things up. I have used it
> at times, it works nicely (it can even replace the kernel detection code
> seamlessly, if put into an initramfs for instance). 
> 
> There's a copy of it in the distributed with the multipath tools.

Great! Exactly what I needed. I did `apt-get install multipath-tools', and now
it works fine. Thanks!

With kind regards,
 
Geert Uytterhoeven
Software Architect

Sony Network and Software Technology Center Europe
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