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SD (Speed Disk) (Advanced Edition only)
Description: Increases the speed at which data can be accessed. The command
does this by moving allocated data fragments so that each
directory or file is stored in contiguous space. This command
also lets you produce a report about file, directory, or drive
fragmentation. In version 4.5, you can specify the priority
order for frequently used directories and files.
Syntax: Version 4.0: SD [(drive:)] [/A] [/D0 | /D1 | D2] [[[/F(n)]
[/B(n)]] | /BW | /TV]
SD [(drive:)] [(path)] [(filespec)] [/REPORT
[/P] [/S] [/T]]
Version 4.5: SD [(drive:)] [/A] [/C] [/D] [/P] [/Q] [/U]
[/V] [/D0 | /D1] [/BW] [/NOSNOW]
SD [(drive:)][(path)][(filespec)] [/REPORT [/P]
[/S] [/T]]
Parameters:
(drive:) The single-letter specifier (A:, B:, C:, etc.) for the drive
you want to process. Follow the letter with a colon. The
current drive is the default.
(path) The full name (C:\WP\LETTERS) of the directory that SD
initially selects for processing if you include the /REPORT
switch. The current directory for the designated drive is the
default.
(filespec) The name of the file(s) for which you want to produce a
fragmentation report. (See /REPORT.) The default (filespec) is
*.*.
/A Rearranges disk allocation without prompting for verification.
Use this switch if you run SD from a batch file.
/B(n) Specifies the background color for the screen displays. Use an
integer from 0 through 15 to specify the color. If you attempt
to specify identical foreground and background colors, SD adds
one to the foreground color number before beginning execution.
Avoid using the high-intensity shade of a color for the
foreground with the normal-intensity shade of the same color
for the background (for example, /F12 bright red and /B4 red).
The default is /B1 (blue). See <NUCOLOR>.
/BW Specifies a black-and-white display.
/C Establishes Complete Optimization as the default Optimization
Method in the Set Options menu. Initiate Complete Optimization
by pressing Enter when the main menu is displayed.
/D Establishes only Optimize Directories as the default
Optimization Method in the Set Options menu. This option
unfragments directories only. Initiate directories
optimization by pressing Enter when the main menu is
displayed.
/D0 Requests the standard screen driver (the default) for a fully
IBM-compatible computer system. This switch also sets the /D
switch in version 4.5.
/D1 Requests the screen driver for a BIOS-compatible computer
system. This switch also sets the /D switch in version 4.5.
/D2 Requests the ANSI.SYS driver for a non-IBM-compatible computer
system.
/F(n) Specifies the foreground color for the full-screen displays.
Use an integer from 0 through 15 to specify the color. The
default is /F15 (bright white). See <NUCOLOR>.
/NOSNOW Prevents screen flicker if your system has an older CGA card.
/P If you do not include the /REPORT switch, this switch
suppresses display of nonprintable characters on the screen
displays; however, when you use this display mode you cannot
distinguish between used and unused blocks. If you include the
/REPORT switch, SD displays the report in pause mode: You
initially see one screenful of information, and you must press
the Spacebar to see the next screenful.
Press Enter to scroll up one line at a time. Press any key
other than Spacebar, Enter, or Escape to exit pause mode. You
can also enter pause mode during normal display by pressing
any key other than Escape.
/Q Establishes Quick Compress optimization as the default option
in the Optimize Disk menu. This option packs the data at the
beginning of the disk but does not unfragment files. Initiate
Quick optimization by pressing Enter when the menu is
displayed.
/REPORT Produces a fragmentation report only. This option produces the
report for all files whose names match (filespec) in (path).
The default (filespec) is *.*. A summary total for the entire
drive is also displayed. You can direct the report to either a
printer or a file by using the MS-DOS output redirection
character ()) followed by a printer name or a filename at the
end of the command.
/S Processes all files whose names match (filespec) in all
subdirectories under the current or specified path.
/T Shows the fragmentation totals only when SD produces a report.
A total is displayed for each directory. If SD is in pause
mode (see /P), the utility might pause several times before
you see a total.
/TV Indicates that the utility is running under either TopView or
Microsoft Windows.
/U Establishes File Unfragment as the default Optimization Method
in the Set Options menu. SD attempts to unfragment files as
much as possible without moving files that are already
contiguous. Initiate file unfragmentation by pressing Enter
when the main menu is displayed.
/V Verifies that data is written to the disk accurately.
Notes:
╔══════════════════════════════════════════════════════════════════════════╗
║ *!* Warning *!* ║
║ ║
║ Do not turn off your computer while SD is reorganizing your disk or your ║
║ disk might be damaged. ║
╚══════════════════════════════════════════════════════════════════════════╝
SD might take 30 minutes or more to reorganize a large hard drive. You can
safely interrupt the process at any point by pressing Escape; SD finishes any
reorganization in progress before halting.
Back up your disk before running SD. Some copy-protection schemes might be
incompatible with the reorganization performed by SD.
Before running SD, be sure to stop any memory-resident programs that might
access the disk while the disk is being reorganized.
After SD has finished reorganizing your disk, the utility asks you whether
you want to reboot your computer. Reboot if you are using the Fastopen
program in MS-DOS version 3.3 or later or if you have a RAM disk installed.
Speed Disk Main Menu <NUSDG01><NUSDG02>.
<NUSDG03> shows the screen display for SD in version 4.5 after you select Set
Options from the master menu in the lower left corner. Choose Optimization
method to select the Complete Optimization, File Unfragment, Quick Compress,
or only Optimize Directories option.
Choose Directory order to define directory priority; for more information,
see the note below. Choose Files To Put First to reset file priority; SD
ensures that files with the EXE or COM extension will be first on the disk.
Choose Unmovable files to name files you do not want SD to move.
Choose Show static files to see the names of system files SD has determined
are unmovable. Choose Verify is OFF to indicate that you want SD to verify
all data it has moved. Choose Exit and Save Options to leave SD and save your
option settings.
After you have set all reorganization options and chosen a drive, be sure the
highlight is on the Optimize Disk option on the main menu and press Enter to
begin execution. SD updates the display as it reorganizes the disk.
To specify the storage order of directories, choose Directory order from the
Set Options menu. The Directory Order selection submenu appears as shown in
Figure 7. The left side of the menu shows the existing directory tree.
Highlight the directory names in the desired sequence and press Enter to
specify the order in which directories are to be stored on the disk. Selected
directories are shown on the right side of the menu. Press Tab to move to the
right side to reorder or delete selected directories or to indicate that you
have finished defining directory priority.