Really appreciate your answers here,Marianne. In fact these tapes (TAPE1, 
....., TAPE10 ) have been running for some time and frequently freeze and 
status code 96 appear. So I manually took out all those 11 tapes from the 
library manually and replaced with the new tapes which are same bar code ( 
TAPE1,..., TAPE11 ). Then after some day later, those TAPE1,...,TAPE10 were 
totally dissappear from the "bpmedialist" and all bkp jobs belongs to them were 
not able bkp.When I chk, I noticed "mounting TAPE1,....,TAPE11 " in the job 
status and never see the "mounted TAPE1,.....,TAPE11"  in order to run the job. 
So the job is pending " mounting TAPE1,....., TAPE11" for long hours and never 
proceed to "mounted TAPE1,...,TAPE11" stage.

             The problem is within this "PLUTO_LTO" volume pool.

( 1 ) Is this changing TAPE1, .. ,TAPE11 could be the problem?

( 2 ) I changed back the orignial TAPE1,...,TAPE11 and bpmedialist still never 
show these tapes. Should I change back the blank tapes with same bar code and 
same media ID tapes to the library ?

( 3 ) Now i temporarily stopped backing up these servers. Should I restart 
these bkp jobs using original TAPES or NEW TAPES with same bar code and same 
media ID?

Many Thanks Marianne. Besides this TAPE11 , all other tapes have no expire date 
in the vmquery. 
 

Netbackupserver# vmquery -m TAPE07
================================================================================
media ID:               TAPE07
media type:            1/2" cartridge tape (6)
barcode:                TAPE07
description:            Added by Media Manager
volume pool:           PLUTO_LTO (37)
robot type:            TLD - Tape Library DLT (8)
robot number:          2
robot slot:              78
robot host:            Netbackupserver
volume group:          00_002_TLD
created:               Thu Mar 31 15:21:59 2005
assigned:              ---
last mounted:          Tue Sep 09 10:53:22 2008
first mount:           Sat Apr 02 09:20:36 2005
expiration date:       ---
number of mounts:      937
max mounts allowed:    ---

This is the expire tape when i chk by bpmedialist but not in vmquery -m.

Netbackupserver# vmquery -m TAPE11
================================================================================
media ID:              TAPE11
media type:            1/2" cartridge tape (6)
barcode:               TAPE11
description:           Added by Media Manager
volume pool:           PLUTO_LTO (37)
robot type:            TLD - Tape Library DLT (8)
robot number:          2
robot slot:            66
robot host:            Netbackupserver
volume group:          00_002_TLD
created:               Mon Sep 27 17:53:19 2004
assigned:              Sun Aug 17 01:35:33 2008
last mounted:          Tue Sep 09 16:11:15 2008
first mount:           Tue Oct 05 14:21:49 2004
expiration date:       Wed Oct 14 18:06:20 2009
number of mounts:      1028
max mounts allowed:    ---
status:                0x0

Here is the output of TAPE11 which show expire by bpmedialist -U

Server Host =   PLUTO

 id        rl     images   allocated           last updated        density  
kbytes restores
                  vimages   expiration          last read           <------- 
STATUS ------->
--------------------------------------------------------------------------------
TAPE11   3     22    08/17/2008 01:35  09/09/2008 15:16    hcart  297765696     
  0
                    22   10/10/2008 15:16        N/A                    EXPIRED

Meaning that two databases are not syn each other .

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