diff --git a/Ubiquitous/XiZi_AIoT/services/fs/fs_server/include/block_io.h b/Ubiquitous/XiZi_AIoT/services/fs/fs_server/include/block_io.h
index f457436fd..2fe14d8af 100644
--- a/Ubiquitous/XiZi_AIoT/services/fs/fs_server/include/block_io.h
+++ b/Ubiquitous/XiZi_AIoT/services/fs/fs_server/include/block_io.h
@@ -18,7 +18,7 @@
 
 // Block size
 #define BLOCK_SIZE 512
-#define NR_BIT_BLOCKS 2
+#define NR_BIT_BLOCKS 8
 
 // bits size
 #define BITS 8
diff --git a/Ubiquitous/XiZi_AIoT/services/tools/mkfs/mkfs.h b/Ubiquitous/XiZi_AIoT/services/tools/mkfs/mkfs.h
index b7d299bb9..e44e96798 100755
--- a/Ubiquitous/XiZi_AIoT/services/tools/mkfs/mkfs.h
+++ b/Ubiquitous/XiZi_AIoT/services/tools/mkfs/mkfs.h
@@ -49,7 +49,7 @@ Modification:
 #define ROOT_INUM 1 // root inode number
 #define BLOCK_SIZE 512 // block size
 #define NR_BIT_PER_BYTE 8
-#define NR_BIT_BLOCKS 2
+#define NR_BIT_BLOCKS 8
 #define nr_blocks_total (BLOCK_SIZE * NR_BIT_PER_BYTE * NR_BIT_BLOCKS) // total number of blocks (including used blocks and free blocks)
 #define nr_inodes 200 // total number of inodes