In an OS/390 2.10 system. where is the esoteric 3590-1 defined? Can it be overridden?

We are trying to migrate an old OS/390 system and the first stage is to migrate the tape usage to a VTL. The VTL looks like 3590-128trk while the old 3590s are 3590-256trak.

The problem is that when an input request for old tapes appear, the system is asking for the real 3590-256track tape to be mounted on the VTL drives (defined as 3590-128track). RMM is the tape manager. We think the system defined 3590-1 esoteric is the problem, but it does not settable in the HCD on that version of OS/390.

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Tony Thigpen

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