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JSI Tip 0316 - Command line NTFS compression.
Jerold Schulman
November 14, 1997
1 Min Read
Compact is a native Windows NT command that displays or alters the compression state of files and directories. The syntax is:
compact [/c] [/u] [/s[:DirName]] [/i] [/f] [/a] [/q] filename [...]
If run without any parameters, it displays the compression state of the current directory.
Parameter | M e a n i n g |
|---|---|
/c | Compresses the specified directory or file. |
/u | Uncompresses the specified directory or file. |
/s[:DirName] | applies the action to all subdirectories of the specified directory, or of the current directory if none is specified. If :DirName is used, the compressed attribute is not altered. |
/i | Ignores errors. |
/f | Forces the action on a previously failed attempt. |
/a | Display files with the Hidden and/or System attribute. |
/q | Displays minimal information. |
filename | Specifies the file or directory. You can use multiple filenames and wildcards. |
To compress the files in the current directroy and all subdirectories, type:
compact /c /s
To compress all files that end in .HTM in the JSI directory and all subdirectories , but not modify the compressed attribute of these directories, type:
compact /c /s:JSI *.HTM
To force complete compression of the file JSI.GIF, which was partially compressed at the time of a disk crash, type:
compact /c /f JSI.gif
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