How rebuild a multi-volumes chain broken containing a single file ?

Products

• CA 1 Flexible Storage

Issue/Introduction

If the chain of a single file multi-volumes is broken, how can it be re-built ? 

Environment

 

:

Resolution

We can have 2 cases:

1) if the volumes can be scratched then clear a volume with invalid multivolume pointers to make available for scratch processing running a TMSUPDTE with the following SYSIN:

VOL nnnnnn,NOCHAIN,NODSN

REP DSN=HEXZEROS

REP 1STVOL=HEXZEROS

REP NEXTVOL=HEXZEROS

REP PREVVOL=HEXZEROS

REP VOLSEQ=1

REP EXPDT=current-date

 

2) Repair a broken multivolume chain if it has not scratched and reused:

VOL nnnnnn,NOCHAIN,NODSN

REP DSN=valid-data-set-name

REP 1STVOL=valid-VOLSER

REP NEXTVOL=valid-VOLSER

REP PREVVOL=valid-VOLSER

REP VOLSEQ=valid-volseq

 

Sample in this case

TMSUPDTE Control Statements - Correcting Multivolume Pointers 
The samples below assume that PARM=NODSN was coded. 

Either
- Clear a volume with invalid multivolume pointers to make available for scratch processing: 

VOL nnnnnn,NOCHAIN 
REP DSN=HEXZEROS 
REP 1STVOL=HEXZEROS 
REP NEXTVOL=HEXZEROS 
REP PREVVOL=HEXZEROS 
REP VOLSEQ=1 
REP EXPDT=current-date 

or

- repair a broken multivolume chain: 

VOL nnnnnn,NOCHAIN 

REP DSN=valid-data-set-name 
REP 1STVOL=valid-VOLSER 
REP NEXTVOL=valid-VOLSER 
REP PREVVOL=valid-VOLSER 
REP VOLSEQ=valid-volseq 

For example a chain of 6 volumes is broken and need to be rebuilt :
VOL 500152 
VER DSN= TAPE41.SYS3.SMFDUMP.M1017 
REP VOLSEQ=1 
REP 1STVOL=500152,NEXTVOL=503500,PREVVOL=HEXZEROS 
VOL 503500,NOCHAIN 
VER DSN= TAPE41.SYS3.SMFDUMP.M1017 
REP VOLSEQ=2 
REP 1STVOL=500152,NEXTVOL=503906,PREVVOL=500152 
VOL 503906,NOCHAIN 
VER DSN= TAPE41.SYS3.SMFDUMP.M1017 
REP VOLSEQ=3 
REP 1STVOL=5001521,NEXTVOL=510591,PREVVOL=503500 
VOL 510591,NOCHAIN 
VER DSN= TAPE41.SYS3.SMFDUMP.M1017 
REP VOLSEQ=4 
REP 1STVOL=500152,NEXTVOL=508956,PREVVOL=503906 
VOL 508956,NOCHAIN 
VER DSN= TAPE41.SYS3.SMFDUMP.M1017 
REP VOLSEQ=5 
REP 1STVOL=500152,NEXTVOL=505910,PREVVOL=510591 
VOL 505910,NOCHAIN 
VER DSN= TAPE41.SYS3.SMFDUMP.M1017 
REP VOLSEQ=6 
REP 1STVOL=500152,NEXTVOL= HEXZEROS,PREVVOL=508956 

 

Once the chain has been rebuilt, a TMSPTRS should be run and check if there are the chaining problems.