chkdsk on Raspberry Pi image

PS D:\> chkdsk
The type of the file system is FAT.
The volume is in use by another process. Chkdsk
might report errors when no corruption is present.
Volume boot created 5/6/2015 11:10 PM
Volume Serial Number is 15CD-3B79
Windows is verifying files and folders...
File and folder verification is complete.
Windows has checked the file system and found no problems.

   58,662,912 bytes total disk space.
       16,384 bytes in 2 folders.
   26,542,080 bytes in 58 files.
   32,104,448 bytes available on disk.

        8,192 bytes in each allocation unit.
        7,161 total allocation units on disk.
        3,919 allocation units available on disk.
PS D:\>