...
>the output of " query dbv" gives only four volumes:
>db1a, db2a, db3a, db4a and theirs copies (miroring) : db1b, db2b, db3b, db4b
>(all have LV STATE = open/syncd ).
>
>I wonder why volumes db5a,6a,7a,8a and db5b,6b,7b,8b (LV STATE=closed/syncd)
>don't appear in the output of the command " query dbv   !?
>
>what's the difference between " open/syncd " and " closed/syncd "
>Are they database volumes again but desactivated for the moment?

Do 'man lslv' in AIX for info on logical volume states.
open/syncd  Indicates that the LV is open and synchronized.
closed/syncd  Indicates that the LV has not been opened,
which indicates the are dormant - not in use.
Your TSM query results suggest that the volumes are not defined to be
used by TSM.  (Your lslv display shows no mount points, indicating the
use of the LVs as raw logical volumes.)
You might search back in your historical Activity Logs to see what
may have transpired regarding the unused volumes.

  Richard Sims, BU