  Calculating capacity of magtape? 
 The Question is:
 
I am attempting to figure the amount of data that is stored on DLTtape III
 tapes. The tapes are 10/20 gb.
 
My calculations dont seem to add up.  I have a total of 54,691,570 blocks of
 data.  I multiply the total blocks by 512 and then divide by 1000000000.  This
 gives me 1.3 gb of data.  Hmmmm that should fit on one tape.
 
mb should be (blocks * 512)/1000000
gb should be (blocks * 512)/1000000000
 
Also what is the compaction ratio using a TZ87 table top unit.
 
Your help would really assist me.
 
Edward A. Lucas
 
 
 The Answer is:
 
  Please see the OpenVMS FAQ for some details of predicting the
  capacity of a magtape.
 
  Also please note that 54,691,570 half-kilobyte units is equivalent to
  27,345,785 kilobyte-sized units, or 27,345,785,000 bytes, or roughly
  27 gigabytes, uncompressed.
 
