| DEFRAG |
|
| Reorganizes the files on a disk to optimize disk performance. Do not use |
| this command when Windows is running. |
|
| Syntax |
| DEFRAG [drive:] [/F] [/S[:]order] [/B] [/SKIPHIGH] [/LCD | /BW | /G0] |
| [/H] |
|
| DEFRAG [drive:] [/U] [/B] [/SKIPHIGH] [/LCD | /BW | /G0] [/H] |
|
| Parameter |
|
| drive: |
| Specifies the drive that contains the disk you want to optimize. |
|
| Switches |
|
| /F |
| Defragments files and ensures that the disk contains no empty spaces |
| between files. |
|
| /U |
| Defragments files and leaves empty spaces, if any, between files. |
|
| /S |
| Controls how the files are sorted in their directories. If you omit this |
| switch, DEFRAG uses the current order on the disk. The colon (:) is |
| optional. The following list describes each of the values you can use to |
| sort files. Use any combination of the values, and do not separate these |
| values with spaces. |
|
| N |
| In alphabetic order by name |
|
| N- |
| In reverse alphabetic order by name (Z through A) |
|
| E |
| In alphabetic order by extension |
|
| E- |
| In reverse alphabetic order by extension (Z through A) |
|
| D |
| By date and time, earliest first |
|
| D- |
| By date and time, latest first |
|
| S |
| By size, smallest first |
|
| S- |
| By size, largest first |
|
| /B |
| Restarts your computer after files have been reorganized. |
|
| /SKIPHIGH |
| Loads DEFRAG into conventional memory. By default, DEFRAG is loaded into |
| upper memory, if upper memory is available. |
|
| /LCD |
| Starts DEFRAG using an LCD color scheme. |
|
| /BW |
| Starts DEFRAG using a black and white color scheme. |
|
| /G0 |
| Disables the graphic mouse and graphic character set. |
|
| /H |
| Moves hidden files. |
|
|
| DEFRAG--Notes |
|
| Network and INTERLNK drives |
|
| You cannot use DEFRAG to optimize network drives or drives created with |
| INTERLNK. |
|
| Disk information reported by DEFRAG and CHKDSK |
|
| Disk information that DEFRAG reports differs from information that CHKDSK |
| reports. DEFRAG reports hidden and user files as one number; CHKDSK reports |
| numbers for each type. DEFRAG counts the root as a directory; CHKDSK does |
| not. DEFRAG does not count the volume label as a file; CHKDSK does. |
|
| Start DEFRAG only from MS-DOS |
|
| If you start DEFRAG from a program such as Microsoft Windows, you may lose |
| data. |
|
| DEFRAG exit codes |
|
| The following list briefly describes the meaning of each DEFRAG exit code |
| (ERRORLEVEL parameter): |
|
| 0 |
| The defragmentation was successful. |
|
| 1 |
| An internal error occurred. |
|
| 2 |
| The disk contained no free clusters. To operate, DEFRAG needs 1 free |
| cluster. |
|
| 3 |
| The user pressed CTRL+C to stop the process. |
|
| 4 |
| A general error occurred. |
|
| 5 |
| DEFRAG encountered an error while reading a cluster. |
|
| 6 |
| DEFRAG encountered an error while writing a cluster. |
|
| 7 |
| An allocation error occurred. To correct the error, use the SCANDISK |
| command. |
|
| 8 |
| A memory error occurred. |
|
| 9 |
| There was insufficient memory to defragment the disk. |
|
| You can use the ERRORLEVEL parameter on the IF command line in a batch |
| program to process exit codes returned by DEFRAG. For an example of a batch |
| program that processes exit codes, see the CHOICE command. |
|
|
| DEFRAG--Example |
|
| To load DEFRAG into conventional memory and specify that DEFRAG sort files |
| according to the date they were created, from latest created to earliest |
| created, type the following command: |
|
| defrag c: /f /sd- /skiphigh |
|
| This example fully optimizes drive C, but slows DEFRAG. |
|
