[parted-devel] freaky loop device handling

Joel Granados jgranado at redhat.com
Mon May 11 13:31:10 UTC 2009


On Mon, May 11, 2009 at 03:06:18PM +0200, Joel Granados wrote:
> I'm starting to see the logic behind the loop label idea.  But I still
> can't understand why it was named this way.  It should have a name like
> "nolabel" or "nopartitions" or "voidlabel"...  These names are much more

or "just_fs", 

> descriptive.
> 
> Regards.
> On Mon, May 11, 2009 at 02:24:51PM +0200, Joel Granados wrote:
> > The loop label might be used to detect device-mapper filesystems (like
> > those found in an LV).  From this another two questions stem out:
> > 1. Why is it called loop? And 2. If its only for device-mapper detection
> > purposes, why is it working on a real device?
> > 
> > any insight appreciated.
> > 
> > Regards.
> > 
> > On Mon, May 11, 2009 at 01:27:13PM +0200, Joel Granados wrote:
> > > Hey list.
> > > 
> > > Here is another freaky parted bug from the realms of parted code :)
> > > I just ran into this and my analysis might be wrong, so suggestions and
> > > corrections are appreciated.
> > > Unfortunately this does not work with loop devices...
> > > 
> > > <snip>
> > > #!/bin/bash
> > > parted="/usr/local/sbin/parted"
> > > dd if=/dev/zero of=/dev/sdc bs=1M count=10
> > > yes | mkfs.ext3 /dev/sdc
> > > $parted /dev/sdc print free
> > > </snip>
> > > 
> > .
> > .
> > .
> > .
> > > way.
> > > 
> > > I'll keep investigating and get back to the list when I have more info.
> > > Any suggestions/explinations are greatly appreciated.
> > > 
> > > Regards.
> > > 
> > > -- 
> > > Joel Andres Granados
> > > Brno, Czech Republic, Red Hat.
> > > 
> > > _______________________________________________
> > > parted-devel mailing list
> > > parted-devel at lists.alioth.debian.org
> > > http://lists.alioth.debian.org/mailman/listinfo/parted-devel
> > 
> > -- 
> > Joel Andres Granados
> > Brno, Czech Republic, Red Hat.
> > 
> > _______________________________________________
> > parted-devel mailing list
> > parted-devel at lists.alioth.debian.org
> > http://lists.alioth.debian.org/mailman/listinfo/parted-devel
> 
> -- 
> Joel Andres Granados
> Brno, Czech Republic, Red Hat.
> 
> _______________________________________________
> parted-devel mailing list
> parted-devel at lists.alioth.debian.org
> http://lists.alioth.debian.org/mailman/listinfo/parted-devel

-- 
Joel Andres Granados
Brno, Czech Republic, Red Hat.



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