Look at your device definition for the 3490 drives... during the
     define devclass you have the ability to set the guess-duh-mation for
     the device via the estcapacity=blah
      Below is the help table from ADSM:
     +--------------------------------------------------------------------+
     | Table 43. ADSM Estimated Capacity for Cartridge Tape               |
     +-----------------------+-----------------------+--------------------+
     | TAPE FORMAT           | MEDIA TYPE            | ESTIMATED CAPACITY |
     +-----------------------+-----------------------+--------------------+
     | 3480                  | CST                   | 180MB              |
     +-----------------------+-----------------------+--------------------+
     | 3480XF                | CST                   | 180MB (see note)   |
     +-----------------------+-----------------------+--------------------+
     | 3490B                 | CST                   | 360MB              |
     +-----------------------+-----------------------+--------------------+
     | 3490C                 | CST                   | 360MB (see note)   |
     +-----------------------+-----------------------+--------------------+
     | 3490B                 | ECCST                 | 720MB              |
     +-----------------------+-----------------------+--------------------+
     | 3490C                 | ECCST                 | 720MB (see note)   |
     +-----------------------+-----------------------+--------------------+
     |NOTE: This format uses the tape drive hardware compression feature, |
     |depending on the effectiveness of compression the actual capacity   |
     | may be greater than the listed value.                              |
     +--------------------------------------------------------------------+


______________________________ Reply Separator
_________________________________
Subject: 3490 Tapes
Author:  ADSM-L at unix,mime/dd.RFC-822=ADSM-L\@VM\.MARIST\.EDU
Date:    11/7/96 5:07 AM


Any ideas why our 3490 tape cartridges are viewed by ADSM to have
only a  180MB estimated storage capacity instead of the 2 to 3 GB
that they should have. We are using an OS400 server and backing up
Netware clients.