Thread: How to confirm there're holes in a file on windows?

I used the C standard I/O `fseek' to create a file which had 50% holes in it. BUT I don't know how to confirm this on Windows. With the same source code compiled on Linux, and then to use `du' and `ls -l' commands I can tell there are holes in the created file (`du' shows almost half size of `ls -l'). On windows, Unfortunately, right click the file, select properties, "size" and "size on disk" are nearly same. So I'm not sure about the holes really exist. Anyone can help? How to check?
Thanks.

Originally Posted by Salem

Sparse Files (Windows)

Hi Salem, Thank you very much!! Finally I created a sparse file.
By the way, if anyone interested in this find `DeviceIoControl' returns 0, try `0x000900C4' instead of `FSCTL_SET_SPARSE'.