backup a linux server via commando line

[fragmasta]

Hello everybody,

I have an little problem to backup a linux server. I already have installed the CA Backup Agent on the maschine and I add and see the linux server under source in the CA Backup GUI.

But when I want to backup files from the server via commando line:

%arcserve%\ca_backup -source 192.168.0.160 -filesystem /u1/backup/db/ -at 12:30 -on 05/07/2015 -Group DBs -description DBs -username root -password XXX

I get the following error:
AE280285 16-10-2013 13:01:12 AE280285: The volume /u1/backup/db/ is missed, or it is specified as a volume, but in fact it is not!

I can backup manually backup from the server.

Anybody an idea?

Christian