backup rotation

from The Free On-line Dictionary of Computing (8 July 2008)

backup rotation

   <operating system> Any system for re-using {backup} media,
   e.g. {magnetic tape}.  One extreme would be to use the same
   media for every backup (e.g. copy disk A to disk B), the other
   extreme would be to use new media every time.  The trade-off
   is between the cost of buying and storing media and the
   ability to restore any version of any file.  One example is
   the {Grandfather, Father, Son} (GFS) scheme.

   (2004-10-08)