diff --git a/.vscode/temp.sql b/.vscode/temp.sql
new file mode 100644
index 0000000..e69de29
diff --git a/MingOS.h b/MingOS.h
index 0c8e486..be50105 100644
--- a/MingOS.h
+++ b/MingOS.h
@@ -25,8 +25,10 @@
 #define OTHERS_R	4						//�����û���Ȩ��
 #define OTHERS_W	2						//�����û�дȨ��
 #define OTHERS_X	1						//�����û�ִ��Ȩ��
+
+// ע umask Ĭ��Ϊ002������ļ�Ĭ��Ȩ�� 664��Ŀ¼Ĭ��Ȩ��775
 #define FILE_DEF_PERMISSION 0664			//�ļ�Ĭ��Ȩ��
-#define DIR_DEF_PERMISSION	0755			//Ŀ¼Ĭ��Ȩ��
+#define DIR_DEF_PERMISSION	0775			//Ŀ¼Ĭ��Ȩ�� 
 
 #define FILESYSNAME	"MingOS.sys"			//��������ļ���
 
diff --git a/os_funs.cpp b/os_funs.cpp
index 8b531f2..07ae208 100644
--- a/os_funs.cpp
+++ b/os_funs.cpp
@@ -761,6 +761,7 @@ using namespace std;
 				//�ҵ�һ�����м�¼�������ļ����������λ�� 
 				posi = dno;
 				posj = j;
+				break;
 			}
 			else if(strcmp(dirlist[j].itemName,name)==0 ){
 				//������ȡ��inode���ж��Ƿ����ļ�
@@ -816,7 +817,7 @@ using namespace std;
 					p.i_dirBlock[k/superblock->s_BLOCK_SIZE] = curblockAddr;
 					//д�뵽��ǰĿ¼�Ĵ��̿�
 					fseek(fw,curblockAddr,SEEK_SET);	
-					fwrite(buf+k,superblock->s_BLOCK_SIZE,1,fw);
+					fwrite(buf+k*superblock->s_BLOCK_SIZE,superblock->s_BLOCK_SIZE,1,fw);
 				}
 				
 
@@ -1625,7 +1626,7 @@ using namespace std;
 		}
 		//д�뵽��ǰĿ¼�Ĵ��̿�
 		fseek(fw,curblockAddr,SEEK_SET);	
-		fwrite(buf+k,superblock->s_BLOCK_SIZE,1,fw);
+		fwrite(buf+k*superblock->s_BLOCK_SIZE,superblock->s_BLOCK_SIZE,1,fw);
 		fflush(fw);
 	}
 	//���¸��ļ���С