----------------------- MS-DOS v6.22 Help: FastOpen ------------------------
<Notes> <Examples>                                                   <Index>
Starts the Fastopen program, which improves performance on computers with
large directories. Fastopen decreases the amount of time that MS-DOS takes
to open frequently used files. Do not use this command when Windows is
Fastopen tracks the location of files on a hard disk and stores the
information in memory for fast access.
    FASTOPEN drive:[[=]n] [drive:[[n][...]] [/X]
In your CONFIG.SYS file, use the following syntax:
    INSTALL=[[dos-drive:]dos-path]FASTOPEN.EXE drive:[[=]n]
    [drive:[[=]n][...]] [/X]
Warning:  To avoid losing data, do not run a defragmentation program such as
          Microsoft Defragmenter while FASTOPEN.EXE is loaded.
    Specifies the location of FASTOPEN.EXE.
    Specifies a hard disk drive for which you want Fastopen to track the
    opening of files.
    Specifies the number of files Fastopen can work with at the same time.
    Valid values for n are in the range 10 through 999. The default value is
    Creates the name cache in expanded memory instead of in conventional
    memory. The name cache is an area of memory in which MS-DOS stores
    (caches) the locations and names of the files that you open. This cache
    conforms to version 4.0 of the Lotus/Intel/Microsoft Expanded Memory
    Specification (LIM EMS).

<Syntax> <Examples>
How Fastopen tracks information
Every time you open a file, Fastopen records its name and location in the
name cache. If you later reopen a file recorded by Fastopen, the access time
is greatly reduced.
Limits on using Fastopen
Fastopen works only on hard disks and does not work over a network. You can
use Fastopen with as many as 24 hard-disk partitions at one time. For each
partition, Fastopen can track the number of files specified by the n
parameter. The maximum number of files that Fastopen can track on all
partitions is 999.
You cannot run more than one copy of Fastopen at the same time. If you want
to change the Fastopen settings, you must restart MS-DOS.
You should not use the Fastopen command from MS-DOS Shell, because doing so
can lock up your machine.
Memory requirements for Fastopen
Fastopen requires approximately 48 bytes of memory for each file that it
Adding the FASTOPEN command to your CONFIG.SYS file
You can add a Fastopen command to your CONFIG.SYS file by using the INSTALL
command. Use this technique when you do not want to start Fastopen from the
MS-DOS command line or from your AUTOEXEC.BAT file.

<Syntax> <Notes>
If you want MS-DOS to track the location of as many as 100 files on drive C,
add the following line to your CONFIG.SYS file:
    install=c:\dos\fastopen.exe c:=100

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Last update: June 14, 2000 06:20 EST by -vjf-
Content © 1997 Microsoft Corporation
All else © 2000 Vernon J Frazee