diff -r fd6446a88fe3 Doc/library/os.rst
--- a/Doc/library/os.rst	Wed Jun 15 23:58:57 2011 +0200
+++ b/Doc/library/os.rst	Thu Jun 16 21:26:50 2011 +0100
@@ -1805,8 +1805,8 @@
    On some Unix systems (such as Linux), the following attributes may also be
    available:
 
-   * :attr:`st_blocks` - number of blocks allocated for file
-   * :attr:`st_blksize` - filesystem blocksize
+   * :attr:`st_blocks` - number of 512-byte blocks allocated for file
+   * :attr:`st_blksize` - filesystem blocksize for efficient file system I/O
    * :attr:`st_rdev` - type of device if an inode device
    * :attr:`st_flags` - user defined flags for file