On Monday, 03/10/2008 at 10:15 EDT, Mike Walter <[EMAIL PROTECTED]> 
wrote:
> Maybe it would be better to keep the USER DIRECT file (or whatever 
you're
> using as the source directory) off the 191 disk altogether, placing it 
on
> a separate disk, and at "known address"?

If you could
  GLOBALV SELECT DIRECTXA SETLP BACKUP_TARGET MAINT 555
or 
  GLOBALV SELECT DIRECTXA SETLP BACKUP_TARGET B

and DIRECTXA would place a copy of a directory *successfully* placed 
online on MAINT 555 or filemode B, would that be sufficient to help 
protect you from casual SNAFUs?  You could envision
  GLOBALV SELECT DIRECTXA SETLP BACKUP_GENERATIONS 3
to make that a bit more sophisticated.

While trying to reconstruct a source directory from an object directory 
might seem logical, far too much information is "lost in translation".

Alan Altmark
z/VM Development
IBM Endicott

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