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Why is the disk volume label important?

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The Question is:

 
Is there any reason why MOUNT /SYSTEM /OVERRIDE=IDEN is not allowed?
 
I have written a workaround to:
moun /over=id disk
vol = f$getdvi("volnam")
dismount disk
mount /system disk 'vol'
 
It is more complex in a cluster, but it can still be done in DCL.

The Answer is :

 
  The volume label is used as the basis for cluster-wide coordination,
  and all shared volumes will effectively use the (unique) label to
  coordinate access, to prevent duplicate volumes, and to ensure that
  the expected volume is the volume that is actually mounted.
 
  Could this be changed?  Certainly.  That said, the OpenVMS Wizard
  would prefer to explicitly reference the target volume label lest
  the wrong volume be mounted.  (Mounting the wrong volume can result
  in data being overwritten due to an unintentional shadowset copy,
  or any number of other adverse or unintended behaviors.)
 
  A local customization to SYS$EXAMPLES:MSCPMOUNT.COM is one of the
  more common approaches for mounting and maintaining access to disk
  volumes.
 

  
     
     answer written or last revised on ( 1-AUG-2002 )
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