Configuring Your Product › Tailoring and Other Considerations › Implementing Support for StorageTek Redwood › Distinguishing the Redwood Device

Distinguishing the Redwood Device

CA Disk supports the Redwood as a distinct device only with dynamic allocation. If archives are written to the Redwood by referencing it on a DD statement in your JCL, it appears that it is a 3420 or 3480 and is recorded as such in the ARCHVOLS record (which is subsequently used by restore, recover, and merge processing to allocate what is thought to be the proper type of device).

You inform CA Disk that a Redwood device is being used and should be tracked in the ARCHVOLS as requiring special allocation by providing the proper value for sysparms ARC0TYPE, ARCCTYPE, MERPnTYP, MERCnTYP, and MERTnTYP. The standard values for these sysparms are TAPE, 3480, or DISK. For Redwood, 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 sysparm ARESUNI1 for auto-restore, and sysparm DYN1UNIT for all other functions. (DYN2 through DY20 options are also provided, but are explained later.)

The following table indicates which sysparms you use to provide the unit name for each device type value of sysparm ARC0TYPE. Sysparms beginning provides unit names for the auto-restore function with ARES, while all other functions take their unit names from sysparms beginning with DYNn/DYnn. The following table shows possible REDWOOD values for ARCOTYPE.