Memorex LOCK - VERSION 2-24 Especificaciones Pagina 245

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Types of Datasets Direct Access Datasets
Chapter 7. Running Jobs With BIM-EPIC 7-25
Direct Access Datasets
For direct access datasets:
LUB allocation is inhibited automatically
Allocation is on cylinder boundaries and datasets are not truncated
Secondary extents are not supported for controlled datasets
For uncontrolled DA datasets, the following apply:
When UNCDSK=NO, there is no limit to the number of extents.
When UNCDSK=YES, there is a limit of 5 extents.
No special EDD requirements.
The VSE job control program requires you to use a DLBL and a complete EXTENT
statement. For BIM-EPIC purposes, however, only the file type (access method "DA") on the
DLBL and the extent sequence numbers on the EXTENT statement must be correct. For both
cataloged and Start Track 1 datasets, the extent sequence numbers must begin with 1. VSE
also requires that secondary extents reside on separate volumes.
The following example shows the EXTENT statement for a controlled dataset. BIM-EPIC
supplies the volume serial number, starting address, and number of tracks/blocks from
information in the catalog.
// DLBL RESDA,'dataset.name',,DA
// EXTENT SYS020,,1,1
The following example shows the EXTENT statement for a Start Track 1 dataset. BIM-EPIC
supplies the actual volume serial number and starting address.
// DLBL RESDA,'dataset.name',,DA
// EXTENT SYS020,POOL01,1,1,1,15
On BIM-EPIC DD statements, specify DCB=DSORG=DA or DCB=DSORG=DAU. This
example could be used to read or update a controlled DA dataset.
* //RESDA DD DSN=INVOICE.TICKETS,DISP=(OLD,KEEP),
* // DCB=DSORG=DA
Description
Configuration
Options
DSN Catalog
JCL Requirements
Examples
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