src/bu_utils/fms.doc

   1 Copyright 2000, International Business Machines Corporation and others.
   2 All Rights Reserved.
   3
   4 This software has been released under the terms of the IBM Public
   5 License.  For details, see the LICENSE file in the top-level source
   6 directory or online at http://www.openafs.org/dl/license10.html
   7
   8 fms - file mark size evaluation
   9
  10 Fms takes a single argument, the tape device to be used.
  11 To use fms:
  12         1) place a scratch tape in the selected tape drive
  13         2) fms <tape special file>
  14            e.g.
  15            fms /dev/rmt0
  16
  17 Fms provides a visual trace of its activity. It runs for quite some time,
  18 possibly in excess of 6 hours on 8mm tape drives. Upon termination, a
  19 brief summary of results will be found in the log file, fms.log, which
  20 is created in the current directory.
  21
  22 The tape size and file mark sizes should be adjusted before being used in the
  23 backup system's configuration files. The tape size should be reduced, to
  24 provide a safety margin (e.g. 10-15% reduction), and the file mark size
  25 should be rounded up or increased.