Smartdrive
SMARTdrv

    A Microsoft MS DOS disk cache program
   to speed up disk access.

   For most users, a 1MB cache is sufficient.  Devoting more
   memory to the cache offers diminishing returns, since the
   additional cache hits become fewer (and the extra memory could
   be better used to reduce swapping).

   Typing SMARTDRV /S at a DOS prompt shows the cache size, a
   hit-and-miss report, and information about which drives are
   being cached.  The hit-and-miss statistics are crucial for
   gauging the effectiveness of SmartDrive settings.  A score in
   the high 80s shows that SmartDrive is well configured.  Run
   SMARTDRV /S several times during a Windows session and note
   the-hit-and-miss figures each time.  If your percentage
   usually falls below 80 percent, you should consider increasing
   the cache size.  You can edit the SMARTDRV line in your
   AUTOEXEC.BAT file to increase both the InitCacheSize and the
   WinCacheSize parameters.

   SmartDrive Monitor is an undocumented Windows program that
   comes with DOS 6.0 for logging and controling the cache.

   (1995-11-22)