CA Disk supports the Magstar device as a distinct device that can only be accessed through dynamic allocation. If archives are written to a Magstar device by referencing the device on a DD statement in JCL, the Magstar device appears as a 3420 or 3480 and is recorded as such in the ARCHVOLS record (which is subsequently used by MERGE, RESTORE, RECOVER, and XCOPY processing as input to the proper device type).
To inform CA Disk that a Magstar device is being used is accomplished by assigning the proper value to the following system parameters:
The standard values for these sysparms are TAPE, 3480, CART, or DISK. To use a Magstar device, a value of DYN1 must be specified. This causes the DYN1 special unit flag bit to be set in the ARCHVOLS record. Subsequent CA Disk dynamic allocation processing examines this bit and, if on, uses the unit name provided by one of two system parameters:
Additionally, sysparm CARTCALC must be specified with a value of "Y" in order for the full length of the tape to be used. As an example, if you were to GEN into your MVS system the esoteric "3590" to represent Magstar, the following sysparm settings would direct BACKUP/ARCHIVE processing to your Magstar devices:
//SYSPARMS DD * <= POINT TO MAGSTAR DYN1UNIT3590 <= USE DYN1 ARC0TYPEDYN1 <= USE DYN1 ARCCTYPEDYN1 <= PRIM TAPE NAME ARC0NAMEyour.primary.name <= COPY TAPE NAME ARCCNAMEyour.copy.name <= USE WHOLE TAPE CARTCALCY /*
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