1 files changed, 16 insertions, 3 deletions
diff --git a/module/utils.py b/module/utils.py
index 94bf78054..424aeaf37 100644
--- a/module/utils.py
+++ b/module/utils.py
@@ -117,12 +117,25 @@ def freeSpace(folder):
         ctypes.windll.kernel32.GetDiskFreeSpaceExW(ctypes.c_wchar_p(folder), None, None, ctypes.pointer(free_bytes))
         return free_bytes.value
     else:
-        from os import statvfs
-
-        s = statvfs(folder)
+        s = os.statvfs(folder)
         return s.f_bsize * s.f_bavail
 
 
+def fs_bsize(path):
+    """ get optimal file system buffer size (in bytes) for I/O calls """
+    path = fs_encode(path)
+
+    if os.name == "nt":
+        import ctypes
+
+        drive = "%s\\" % os.path.splitdrive(path)[0]
+        cluster_sectors, sector_size = ctypes.c_longlong(0)
+        ctypes.windll.kernel32.GetDiskFreeSpaceW(ctypes.c_wchar_p(drive), ctypes.pointer(cluster_sectors), ctypes.pointer(sector_size), None, None)
+        return cluster_sectors * sector_size
+    else:
+        return os.statvfs(path).f_bsize
+
+
 def uniqify(seq, idfun=None):
 # order preserving
     if idfun is None: