Got some feedback from Innovation Tech Support concerning my question
about changing DSNENQ and ENQ values. The bottom line was leave them as
they are. There would be some risk and it simply isn't worth it. 

-----Original Message-----
From: O'Brien, David W. (NIH/CIT) [C] 
Sent: Tuesday, March 06, 2007 11:20 AM
To: [email protected]
Subject: FDR question for Bruce Black

 
We are currently using the following for our weekly volume backups which
are then used at DR:

  DUMP TYPE=FDR,ONLVOL,BUFNO=MAX,DSNENQ=USE,MAXTASKS=6,       
     REMOTE,ENQ=ON,MAXERR=999,ENQERR=NO,TAPERRCD=NO,DATA=USED 
  MOUNT VOLG=DSL                                              

Currently some users experience contention problems running FTP's if the
backups run late. Since these FTPs involve a critical application I was
wondering if we could eliminate the problem by changing

DSNENQ to NONE which is the default
ENQ to OFF which is the default

We are running FDRABR VER. 5.4/41P.

If I make these changes do I run the risk of having unusable volume
copies at DR or unusable dataset backups?

My manager is concerned that turning ENQ off might allow the VTOC to be
updated in flight rendering the backup unusable.
I could in the event of an actual disaster, restore an earlier backup
and then apply incremental HSM backups however we only transport 1 copy
of the volume backups so that won't be an option for DR testing.

Thank you,
Dave O'Brien    

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