>Hi all,
>
>My apologies if you are receiving this twice, I have had some mails sent to
>me saying that the last message got a bit scrambled.
>
>We are running an ADSM server 3.1.1.6 installation on OS/400 V4R3.  We have
>a 3570 C model tape library attached to the AS/400 and are backing up NT
>clients.
>
>When I initially installed ADSM I configured the Device Class for the 3570
>as FORMAT=DRIVE (no FORMAT=3570C available on OS/400) and let the estimated
>capacity default to 4,990 MB.  Each of the tapes will get to 99 odd percent
>full and the status will then change to full and a new tape will be
>mounted.  We have subsequently done some testing and found that native
>AS/400 backups will backup nearly two and a half times that using the same
>data on the Internal File System.  After reading some of the posts on
>adsm.org I changed the estimated capacity of the tapes to 15GB (assuming
>the compression ratio 3:1) and have just managed to get 10.3 GB on a tape.
>ADSM has now received an end of tape message and instead of changing the
>status of the tape to full the access has just become Read Only due to a
>perceived error.
>
>Help - what do I do?  I can't leave the capacity at 4.8 GB because the
>tapes are not actually full when that threshold is reached and am therefore
>wasting a good percentage of empty tape ($$).  Conversely, setting the
>capacity too high also results in a problem.
>
>Is the stop at estimated capacity unique to the OS/400 version of the
>software or does it happen on all platforms?  Is there a happy medium?
>
>Any help or suggestions will be GREATLY appreciated.
>
>Thanks in advance
>
>Scott Douglas
>