TMOSCRxx 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 that are processed by TMSINITD.
Notes:
If specified, the table created from TMOSCRxx 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 1 calls for another tape and issues a console message (IECTMS3) with a NOT SCRATCH 80 condition code. 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 NOT SCRATCH 84 condition code. It is also used by TMSCLEAN SCRATCHLIST and SCRATCHRELIST processing to report the assigned tape pool for the tape being scratched.
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