I have been having problems with this software now for about a year.
Twice in the year I have changed The DLT tape unit, and the tapes as all
te errors I get in Arcserve point to "Bad Media". How can it be? The DLT
unit was changed by HP technicians and the tapes brand new. I have also
reinstalled ArcServe from scratch, completely deleting all Databases and
starting again. I don't know what else to try.
I get the following errors:

1145 - MEDIA IS BAD
1027 - BAD TAPE
3035 - FAILED TO START SESSION, A6
MODULE: FILE SERVER
1051 - TAPE HARDWARE ERROR OR MEDIA ERROR
0015 - BACKUP OPERATION FAILES

Also, I get the following message:
The following media can be used in Device Group:

Media Name Serial # Media Pool Sequence
1 TAPE 1225102614 DEFAULT 1
2 TAPE 1225102608 DEFAULT 1
3 TAPE 1225102615 DEFAULT 1
4 TAPE 1225102603 DEFAULT 1
5 <BLANK>

I have 24 tapes which are rotated.

Arcserve is setup to:
-backup to BlanK Media
-Overwrite Same Media Name, or Blank Media First, then Any Media
-Overwirte Same Media Name, or Blank Media

Does anyone have any suggestions? Thank you