cross-device copying / USB improvements

[benny]

Simon 'corecode' Schubert wrote:
> 
> why not just use rsync?
> 
that depends on "who" should use rsync?

if you mean that *the user* could use rsync instead of cp 
in the first place - then you are right

but that was the whole point of my suggestion - to give a better user
experience:
IMHO the user should not have to know and install a tool like rsync 
(nor to know mirror-copy) only to be able to transfer data reliably and
resumeable from one device to another... I mean, it's such a basic thing
that one tool (cp) should do it.

if you mean that "cp" should use rsync as proposed - then there may be two
caveats against having it as part of the base: 
- the license is GPL
- rsync is not maintained by you

so one might suggest a (partial) rewrite under BSD license. that could take
some time - the suggestion for "hammered" devices could serve as a starting
point.

cheers,
Benny