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Special Processing Conditions

The following special processing conditions exist:

OPTCD=W

Specified in JCL; causes Tape Write Immediate, which, on physical 3480s and 3490s, forces a physical write to tape before returning channel end and device end to the host. CA Vtape processes OPTCD=W if requested; however, some records may be in flight and not yet saved in the DASD buffer when channel end and device end are returned to the host.

OPTCD=C

Specified in JCL; forces channel command chaining and is accepted by CA Vtape.

OPTCD=Z

Specified in JCL; indicates shortened error recovery for physical tapes. This OPTCD is accepted by CA Vtape but does not affect processing.

LABEL=n

Use of tape label types not supported by the Tape Management System (that is, LABEL=AL) may result in the Tape Management System exhausting all available virtual tapes. Use of unsupported label types, whether for a specific or a nonspecific volume request, should be avoided.