diff --git a/related_info/lab8/sfs-homework.md b/related_info/lab8/sfs-homework.md
index 41d011a..a8d4326 100644
--- a/related_info/lab8/sfs-homework.md
+++ b/related_info/lab8/sfs-homework.md
@@ -38,7 +38,7 @@
 ### 完整文件系统的例子 
 ```
 fs.ibitmap: inode bitmap 11110000
-fs.inodes:       [d a:0 r:6] [f a:1 r:1] [f a:-1 r:1] [d a:2 r:2] [] ...
+fs.inodes:       [d a:0 r:5] [f a:1 r:1] [f a:-1 r:1] [d a:2 r:2] [] ...
 fs.dbitmap: data bitmap  11100000
 fs.data:         [(.,0) (..,0) (y,1) (z,2) (x,3)] [u] [(.,3) (..,0)] [] ...
 ```