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Resetting file attributes?

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The Question is:

 
I have a file that I pulled off a tape the file is unblocked ascii with a
block size of 2048. I need to know how to change the block size from 2048 to
512.
Thanks
 
Carrie

The Answer is :

 
  The OpenVMS Wizard will assume that you already know that the blocking
  on an OpenVMS disk is always in blocks -- units of 512 bytes -- with
  the minimum disk allocation in units of blocks known as the volume
  cluster factor.  (On a very few disks, the underlying disk sector size
  may differ, but OpenVMS always presents the user with 512 byte blocks.)
 
  SET FILE/ATTRIBUTES is the usual approach for brute-force attributes
  changes, but (depending on the particular situation) an application
  program or the CONVERT/FDL tool may be required.
 
  For information on changing BACKUP saveset file attributes, please see
  the OpenVMS Freeware V4.0 RESET_BACKUP_SAVESET_ATTRIBUTES.COM tool, in
  http://www.openvms.digital.com/freeware/000tools/ or included with the
  Freeware CD-ROM set in the OpenVMS V7.2 distribution.
 

  
     
     answer written or last revised on ( 1-JUL-1999 )
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