Backup Server session id is:  8.  Use this value when executing the
'sp_volchanged' system stored procedure after fulfilling any volume change
request from the Backup Server.
Backup Server: 6.28.1.1: Dumpfile name 'SWAYSDB071190FC0B' section number 0001
mounted on disk file '/sybase/tmp/DISWAYSDB070429.dump'
Backup Server: 3.14.2.4: Logical page -1 is not in the given database map.
Msg 8009, Level 16, State 1:
Line 16:
Error encountered by Backup Server.  Please refer to Backup Server messages for
details.

把backup server的日志贴出来
select * from sysusages where dbid=object_id("DBname")结果也贴出来