Consider this technique if your tape management system supports an option to designate tapes as in-use as long as they are cataloged, and as available scratch tapes when they are uncataloged. This technique is appropriate for CA TLMS or CA 1, both from CA. When CA Disk determines that all data on a tape has expired, CA Disk releases the tape and makes it eligible to be a scratch tape by uncataloging it.
To implement catalog control, you must use the expiration date that your tape management system defines for that purpose. For tapes dynamically allocated by CA Disk, you must specify this value in sysparm DYNEXPDT. If at some point you decide to override dynamic allocation by providing JCL for the output tapes, you must provide this value in the LABEL=EXPDT=yyddd parameter for the tape DD statements.
To have CA Disk catalog the tapes it creates, do not specify DISP=(NEW,CATLG) in the JCL. Instead, specify sysparm ARCTNAME with an appended value of C. CA Disk generates a unique name for each tape it creates, and then catalog it. You should also specify sysparm UNCATARC with a value of Y, to have CA Disk help keep your system catalog clean by uncataloging each tape when it returns it to the scratch pool.
Important! In the event you lose the catalog that your CA Disk tapes are cataloged in, your tape management system can scratch all CA Disk tapes. Take appropriate steps to prevent this from occurring.
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