In a message dated 9/13/2005 9:56:21 P.M. Central Daylight Time,  
[EMAIL PROTECTED] writes:

I only  used FDRINSTANT. Didn't have to do any of this. Needs a
blank target in  same storage groups and whoosh it's done. Backups
run at same speed as tape  controller no slower no  faster.



FDRINSTANT is doing all of the above under the covers for you.  If it  has 
control over the volume (which is normal for FDR), it won't need to allocate  a 
new data set covering the target voume's tracks that correspond to the source  
tracks.  My point is that the backup, which some may say is done in a  couple 
of milliseconds, is not really done until that tape controller finishes  
rewinding the last backup tape, created at tape write speed.  So the backup  is 
not really finished in a couple of milliseconds, but rather however long it  
takes to copy X number of thousands of DASD tracks to tape.  Something  called 
a 
backup is available after 2 milliseconds, but a real usable backup copy  takes 
minutes or hours.
 
Bill Fairchild

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