STK emulates some of the IBM 3480/3490 characteristics, but each new device has unique identification so that CA Disk can identify the device type and in turn estimate its capacity. We need to get STK internal documentation for each new device for this identification process.
CA Disk has a table that reflects characteristics for each tape device. This table needs to be updated for each new device. Without the latest information, CA Disk cannot fully utilize your tapes.
To determine the capacity of tape devices, it usually requires that we issue an EXCP to the channel program to get device statistics form the Read Buffered Log, Read Device Characteristics, Read Configuration Data, or Read Media Sense.
If the device does not conform to our CA Disk tables, capacities will default to basic values. This can affect the estimated capacity of these devices. Check Merge or Archive/Backup message "ADSDM928 3825" for DEVICE TYPE and estimated CAPACITY of your device. Notify your CA representative if you have a new tape device and feel that your tapes are not being fully utilized.