To pre-format a data area, execute DBUTLTY using the following command format:
►►─ PREINIT AREA=aaa,DBID=n,BLKSIZE=size ─┬─────────────┬───────────►◄ └─ VOLUMES=n ─┘
Command
Invokes the function to pre-format data areas for CA Datacom/DB use.
Required Keywords
You can PREINIT a data area with PREINIT AREA=aaa where aaa Identifies the data area to be pre-formatted. To PREINIT a data area, the aaa cannot be IXX.
DATACOM-NAME of the area in the specified database
(No default)
Identifies the database containing the area that is to be initialized.
DATACOM-ID of the database
(No default)
BLKSIZE is the size of the data area blocks within the data area. The size is based upon the tables that are to be stored in the area. For PREINIT data area, specify the size in BLKSIZE=size to match the block size that you intend to provide in the CA Datacom Datadictionary definition for the data area.
512 - 32767
a valid block size
(No default)
Optional Keywords
The n in VOLUMES=n is the maximum number of volumes to initialize. Without the VOLUMES= option, the number of volumes having specific VOLSER information is initialized. The VOLUMES= option allows more volumes to be catalogued as part of the data set and available to an EXTEND or dynamic EXTEND, while being effectively held in reserve without a specific allocation.
For example, you could specify VOLUMES=3 when using a PREINIT to initialize an area that needs 3 volumes, intending to only initialize the space on 3 volumes. But the JCL could specify 6 specific volumes, for example, VOL=SER=(VOL001,VOL002,VOL003,VOL004,VOL005,VOL006), so that volumes 4/5/6 are not allocated or used during the INIT but are available to a dynamic extend. In this case, the extra volumes would not need to be removed before another INIT.
the number n of volumes to be catalogued
(No Default)
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