As the volhdr file is one that NW creates by itself - you can not even create 
it.

But obviously, there is a name resolution issue - the IP in the device name 
(\\10.1.1.10\Diskbackup ) is actually leading to \\10.1.2.211\Diskbackup.
This is obviously the invalid argument.

+----------------------------------------------------------------------
|This was sent by carsten_reinfeld AT avus-cr DOT de via Backup Central.
|Forward SPAM to abuse AT backupcentral DOT com.
+----------------------------------------------------------------------

To sign off this list, send email to listserv AT listserv.temple DOT edu and 
type "signoff networker" in the body of the email. Please write to 
networker-request AT listserv.temple DOT edu if you have any problems with this 
list. You can access the archives at 
http://listserv.temple.edu/archives/networker.html or
via RSS at http://listserv.temple.edu/cgi-bin/wa?RSS&L=NETWORKER