Backup and restore Debian 7.8 Error is not recoverable: exiting now How to do?

Healthy guys!
Make a backup of the article https://habrahabr.ru/post/251659/
But when restoring I get this error:
tar: Skipping to next header

gzip: stdin: unexpected end of file
tar: Child returned status 1
tar: Error is not recoverable: exiting now

My code backup:
tar-cvzpf backup.tgz / --exclude=/proc --exclude=/lost+found --exclude=/backup.tgz --exclude=/sys --exclude=/var

And recovery:
tar --same-owner-xvpf /usb/backup.tgz - C /mnt/
Tried to specify the extension when beloperone tar.gz, tgz just tar the result is the same
Anyone have opinions?, take all
July 2nd 19 at 13:24
2 answers
July 2nd 19 at 13:26
--exclude=/dev --exclude=/tmp
explain for what? - emmy.Pfannerstill commented on July 2nd 19 at 13:29
: because /dev and /tmp don't need backup, as well as the /proc and /sys - laney38 commented on July 2nd 19 at 13:32
July 2nd 19 at 13:28
tar --same-owner-xvpf /usb/backup.tgz - C /mnt/

Between a and C should not be blank. With a space it turns out that you want to extract /usb/backup.tgz, and behind him -- stdin what you called gzip from tar and says "gzip: stdin: unexpected end of file".
I'm afraid the problem lies elsewhere, as there is no space, tried to reset still the same error - emmy.Pfannerstill commented on July 2nd 19 at 13:31

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