On 03/27/2013 07:39 PM, Bj�rn Nadrowski expounded in part:
> I recovered my data.
> Thanks for all your help.
> The problem was in fact knoppix, but not because it had an older 
> version of lvm2 or even lvm1.
>
> The problem was that the human-readable part I extracted from the 
> beginning of the device contained invisible characters in front of the
> 'vol0' label in the file 'volt.txt' .
> These characters were not visible in terminal using 'cat', 'more', and 
> they also did not appear in standard error as a consequence of the 
> 'vgcfgrestore' command, as witnessed by the first line of the error:
>
Learn to use 'vim', at least for rudimentary use.  It is the code editor 
on live CDs because its minimal version is very small.  The enhanced 
version adds a macro language with a huge library.