Dê uma olhada no comando restore
. Tem um switch, -C
, que parece com o que você está procurando.
trecho da página de restauração do manual
-C This mode allows comparison of files from a dump. Restore reads the
backup and compares its contents with files present on the disk. It
first changes its working directory to the root of the filesystem that
was dumped and compares the tape with the files in its new current
directory. See also the -L flag described below.