Nawir,

I think you need to re-read that section of the manual.  While I agree it is
poorly formatted, it does not say what you suggest.  What it says is
"Multiplexed backups cannot be read with any version of tar."  That includes
the NetBackup version.  See also the note at the end of pp. 717, which says,
"This procedure [that explains how to read NBU tapes with tar] will not work
with multiplexed tapes."

It also says that backups that span tapes have to be concatenated to be read
with tar.  IOW, you have to use dd to contatenate them to a disk, then use
tar to read the tar images from tape.

You also cannot read images that have been compressed using NBU compression,
or encrypted using NBU encryption.

My experience has also shown that you cannot easily read tapes that have a
fragment size other than 0 (infinite).

Feel free to try and prove me wrong on this one.  There are thousands of NBU
users that would love to know how to read their MPXd tapes with NBU tar.

> According to Netbackup Business Server 4.5 System 
> administration Guide for UNIX p. 715 -Multiplexed backups 
> cannot be read by any version of tar -gnu tar can't read 
> compressed tape while netbackup tar
> (/usr/openv/netbackup/bin/) can. Netbackup tar is modified 
> version of gnu tar.