Possible bug to report (loss of data)

[Harry Putnam <reader@newsguy.com>]

I have what I hope is not a bug but some kind of pilot error to
report. 

I wanted to change an archives name. (m2-ImagesMusic)

A previous post mentioned this with an ensuing error.  This is a
different case.

My original archive was not touched in any of the commands so far as
evidenced by this report today:

reader > tarsnap --print-stats -f m2-ImagesMusic
                                       Total size  Compressed size
All archives                          47451648538      36380067956
  (unique data)                       34288392255      27769702415
m2-ImagesMusic                        47015370569      35992271855
  (unique data)                       33883962222      27409965425


That tallies with the original upload report (which I no longer have).

OK, 

Digging in the archives I found this question and answer:
  Colin Percival | 9 Mar 22:03
  Re: Rename archives?

  On 03/09/11 12:40, Morten A. B. Sjøgren wrote:
  > Because of a change in hostname, which is used to generate archive
  > names, my archive names are inconsistent.  Is it possible to
  > rename old archives?

  Only by copying the archive (via tarsnap -c -f foo @@bar) and
  deleting the old archive.

So I did that:

  tarsnap -c -f m2-ImagesMusic-11.06.30_083216 @@m2-ImagesMusic
  tarsnap: Error reading archive m2-ImagesMusic: Pathname in pax header
  can't be converted to current locale.

                                       Total size  Compressed size
All archives                          47451647043      36380066594
  (unique data)                       34288390760      27769701053
This archive                            432979189        386430105
New data                                   105045            73442
tarsnap: Error exit delayed from previous errors.

-------        ---------       ---=---       ---------      -------- 

And followed with the rest of the procedure .. deleting the original.

reader > tarsnap -d -f m2-ImagesMusic
                                       Total size  Compressed size
All archives                            436276474        387794739
  (unique data)                         404428538        359735628
This archive                          47015370569      35992271855
Deleted data                          33883962222      27409965425
-------        ---------       ---=---       ---------      -------- 

But now the renamed archive is way smaller than the original:

reader > tarsnap --print-stats -f m2-ImagesMusic-11.06.30_083216
                                       Total size  Compressed size
All archives                            436276474        387794739
  (unique data)                         404428538        359735628
m2-ImagesMusic-11.06.30_083216          432979189        386430105
  (unique data)                         401151733        358381728


So its dropped from the original:    47015370569   
                              to:      432979189

Hopefully I'm just not understanding what the numbers mean.