CTOSCRxx specifies scratch pool definitions by naming the scratch tape pools and describing the ranges of the tapes belonging to the tape pool. The physical characteristics of the tapes for a specific scratch pool are user-defined. The contents of this member are defined through control statements processed by TLC6INIT.
Note: CTOSCRxx must be used if CTONSMxx is used.
Note: If you intend to specify scratch subpools only using the VOL=SER= parameter, you must still have at least one entry in CTONSMxx.
If specified, the table created from CTOSCRxx is used at OPEN and EOV for tapes mounted by nonspecific requests to verify that the mounted tape is from the requested scratch tape pool. The volume serial number of the tape must be in the scratch tape pool assigned. If any tape is mounted from outside the scratch pool range, CA TLMS calls for another tape and issues a console message. The tape is then demounted. Similarly, if a tape mount is satisfied by a pool-controlled volume but is not valid for the requesting data set name or job name, the volume is demounted with a SCRATCH.
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