查看壓縮情況

# /A        Displays files with the hidden or system attributes.
#           These files are omitted by default.

Z:\>compact /a

 Listing Z:\
 New files added to this directory will not be compressed.

        0 :         0 = 1.0 to 1   $RECYCLE.BIN
        0 :         0 = 1.0 to 1   backup
        0 :         0 = 1.0 to 1 C SecurityDBBack
        0 :         0 = 1.0 to 1   Software_Backup
        0 :         0 = 1.0 to 1   System Volume Information

Of 5 files within 1 directories
1 are compressed and 4 are not compressed.
0 total bytes of data are stored in 0 bytes.
The compression ratio is 1.0 to 1.

設定壓縮

Compresses Subdirectories

/C        Compresses the specified files. 
           Directories will be marked so that files added afterward will be compressed.

/S        Performs the specified operation on files in the given directory and all subdirectories.  
           Default "dir" is the current directory.

compact /c /s:test_folder

Uncompresses

/U        Uncompresses the specified files.  Directories will be marked
          so that files added afterward will not be compressed.