Backup system is built with NBU6.5; MS iscsi initiator 2.05 is installed on backup server. When iSCSI connect with VTL3605 and start backup task, sometimes backup task success and sometimes backup fail, backup software prompt media write error.
1. Uninstall MS iscsi initiator 2.05 and install MS iscsi initiator 2.08.
2. Run backup task again, backup is successful and no error reports.
Compatibility problem exists between NBU6.5, MS iscsi initiator 2.05 and VTL3605. When disk is full, the tape cannot switchover automatically, causing backup task fail.