"Wang Penghui" <wangpenghui@gmail.com> writes:

> Is there any incremental backup method suitable for my situation?

With rsync (over SSH for security), only the blocks of data that are
changed are copied over. Of course the first you run rsync the entire
contents will have to be copied over.

What OS are you running? It may be possible to do incremental backups
with other programs ((ufs)dump, star (Schilly tar), cpio combined with
find).

--
David Magda <dmagda at ee.ryerson.ca>
Because the innovator has for enemies all those who have done well under
the old conditions, and lukewarm defenders in those who may do well
under the new. -- Niccolo Machiavelli, _The Prince_, Chapter VI