Accessing Windows drive letters under cygwin
If a drive does not have an explicit mount point configured Cygwin will default to an imaginary mount point under /cygdrive. So “c:\windows\system32” becomes “/cygdrive/c/windows/system32”. (In most cases it’s best to change “\” into “/”.)
You can also create an alternate mount point and mount the drive there:
$ mkdir /c
$ mount c:/ /c
In this case “c:\windows\system32” becomes “/c/windows/system32”. Run “mount” to see the current list of mount points.