You may want to take a look at setting up a reclaim pool for each of the
drives. The reclaim pool must be a sequential file device. Set the reclaim
pool to migrate back to the tape drive, set the hi to 0 and the low to 0 so
you don't hang stuff out on the reclaim pool.

Ken

> -----Original Message-----
> From: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU]On Behalf Of
> Daniel Mondaca S. - Dpto. Procesam. Infor. Sub. Dir. Informatica
> Sent: Friday, August 06, 1999 11:04
> To: ADSM-L AT VM.MARIST DOT EDU
> Subject: Space Reclamation and mounted tape problems
>
>
> Hi everybody,
>
> I'm new in ADSM administration so I'm sorry if my questions are too
> basics.
>
> I hope anybody can help me on some problems that we are experiencing
> with ADSM.
> We have ADSM version 3.1.2.0 runing on a Sun Enterprise 1000 domain with
> Solaris 2.5.1 working with 2 IBM 3590 tape devices configurated as 2
> libraries (DSMLIB01 and DSMLIB02) each with separated storage pools
> defined.
>
> The problems:
> 1.- In the last few days the system has began to make a lot of Space
> Reclamation process that take too much time to finish afecting the
> completition of normal backups.
>
>
> In my instalation the process makes the following steps:
>         - Take a tape(1) and copy it's useful contents to a empty
> tape(2).
>         - Take another tape(3) and copy it's useful contents to the
> second tape above (2)
>         - Repeat the process until de destination tape(2) become full
> with useful data.
>         - Copy the tape(2) to one of the original tapes and let it as
> scratch.
>         - Let the rest of te tapes as scratch.
>
> In this process all data is moved twice from one to other tape
>
>  Is there any way to make the Space Reclamation process faster?
>  Is there any way to take up Space Reclamation manually?
>
>  So far, I don't have plans to puchase another Tape device.
>
>
> 2.- Some times there are tapes that  become in a strange statatus:
>         The tape is mounted in the drive.
>         When I make a "query mount" command in the DSMADMC the system
> answer indicating that there are 1 tape mounted in use.
>         I check the system and there are not process o sessions running.
>
>         I go to the 3590 drive and I can't see any operation with the
> tape.
>
>     The status I described above doesn't change for hours unless I
> shutdown and start ADSM server program.
>     I can't use the dismount command because the tape status in IN USE.
>
>     Is there any way to force the dismount of the tapes or to change
> it's status to IDLE?
>     I think this is a program bug. Anyone has hear about this problem?
>
> Thanks in advance,
>
>                 Daniel Mondaca S.
>               System Engineer
>