Greg Wooledge (12023-03-17):
> > I have a block device on the local host /dev/something with data on it.
                                                           ^^^^^^^^^^^^^^^
There. I have data, therefore, any solution that assumes the data is not
there can only be proposed by somebody who did not read carefully.
> 
> And so on.  In fact, I don't see the word "btrfs" anywhere in the email.
Indeed.
> Oh and hey, as long as we're being meta here, why would you write a
> sentence like:
> 
> > I have a block device on the local host /dev/something with data on it.
> 
> Why wouldn't you give the actual NAME of the block device, and say what
> type of file system is on it?  Assuming it's a file system, and not a
> raw partition used for swap, or an Oracle database, or glob knows what.
> This vagueness serves no purpose at all.
It is not vagueness, it is genericness: /dev/something is anything and
contains anything, and I want a solution that works for anything.
Regards,
-- 
  Nicolas George
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