>[оверквотинг удален]
> 1.1 A brief look or summary.
> ‘this excellent book can only be a snapshot of a complex industry’
> 1.2Computing A record of the contents of a storage location or data
> file at a given time.
> ‘the procedure takes a new snapshot and does pixel counts for various
> sub-areas’
> 2snap shotA shot in soccer or hockey taken quickly with little backlift.
> ‘Morris had to make a good save from a snapshot by a
> defender’
> ====

Угу. В связи с чем, снапшот больше напоминает условный dd if=/dev/sda of=/snapshot.img, нежели условный tar -cvf /snapshot.tar /