MSU tape positioning

Be aware thet there are several EOF marks (thus files) per MSU data buffer! The data tape looks like this:

  ansi VOL1
  ansi HDR1
  ansi HDR2
  EOF
    **** data set 1
  EOF
  ansi EOF1 
  ansi EOF2 
  EOF
  ansi HDR1
  ansi HDR2
  EOF
    **** data set 2
  EOF
  ansi EOF1 
  ansi EOF2 
  EOF
  ansi HDR1
  ansi HDR2
  EOF
    **** data set 3
  EOF
  ansi EOF1 
  ansi EOF2 
  EOF
  ansi HDR1
  ansi HDR2
  EOF
    **** data set 4
  EOF
  ansi EOF1 
  ansi EOF2 
  EOF

  etc

Thus to get to data set # 3 it's best to skip to file # 6 (trew /dev/nrst8 6 would do that) and then sort as

   dmp_msu 100000000 3 2D 1

- since that would allow you to see the two ansi header files, sort all the data in the 3'rd data set and see the two ansi trailor files! The dmp_msu utility does not try to be clever about counting files and data sets, that's up to the user.

The rule is: to get to the n'th data set, skip

            (n'th-1)*3

files using the trew utility or mt utility. The first and last block of the 'data set' are MSU header and trailor blocks with some experiment information. These blocks are recognized and printed