Setting Change Bit to "ON" for newly created FDS/FDB unload files

Products

• DISK BACKUP AND RESTORE
• Disk Backup and Restore - MVS
• DISK BACKUP AND RESTORE FOR MSP
• DISK BACKUP AND RESTORE- ADD-ON OPTIO

Issue/Introduction

All Disk FDS/FDB Unload files (SEQFILES) created either:

- for FDSs using "PGM=ADSMI002,PARM=ADSDM177"

or

- for FDBs using "PGM=ADSMI002,PARM=ADSDC177"

have the Change Bit always set to 'OFF'.  

Why this behavior and how to set the Change Bit in 'ON' for these SEQFILES.

 

 

Environment

Release : All

Component : Disk Backup and Restore

 

 

                     
                                                                              

Cause

Disk will not update the F1-DSCB at OPEN if the CDE program name in the top RP starts with ADSMI, ARC or ADRDSS , as defined by default in the program exclusion table (ADSOPPGM). This is described in the Disk Installation Guide, chapter "The CA Disk SVC" for program ADSMVS60 which is called by the SVC for F1-updates.

Resolution

It is possible to perform this DSCB update to set manually the Change Bit for the output data set of the UNLOAD, using the "DSCB Update Utility".  It is described in the Disk Documentation at the following link : 

DSCB Update Utility                  

 Here a sample job: 

//UPDATE   EXEC PGM=ADSMI002,PARM=ADSDM235,REGION=1024K
//STEPLIB   DD  DISP=SHR,DSN=CA.DISK.CCUWLOAD
//PARMLIB   DD  DISP=SHR,DSN=CA.DISK.CCUWPARM
//ABNLDUMP  DD  DUMMY
//CMDPRINT  DD  SYSOUT=A
//MSGPRINT  DD  SYSOUT=A
//PARMLIB   DD  DISP=SHR,DSN=CA.DISK.CCUWPARM
//SYSPRINT  DD  SYSOUT=A
//SYSUDUMP  DD  SYSOUT=A
//SYSIN     DD  *
    DSCB NOSIM,DSNAME=ddd,VOLUME=vvvvvv,......
....                                                                         

The step could be added to the UNLOAD Job, or maybe even into the UNLOAD procedure.