diff --git a/components/dfs/filesystems/uffs/src/example/flash-interface-example.c b/components/dfs/filesystems/uffs/src/example/flash-interface-example.c
index 36734e701ca4386e475ed87d23e6373b8955db1d..248dea17101bdb4d1a3c129150abeb8a16a26b66 100644
--- a/components/dfs/filesystems/uffs/src/example/flash-interface-example.c
+++ b/components/dfs/filesystems/uffs/src/example/flash-interface-example.c
@@ -387,8 +387,30 @@ static int my_init_filesystem(void)
 		uffs_RegisterMountTable(mtbl);
 		mtbl++;
 	}
-	
-	return uffs_InitMountTable() == U_SUCC ? 0 : -1;
+
+	// mount partitions
+	for (mtbl = &(demo_mount_table[0]); mtbl->mount != NULL; mtbl++) {
+		uffs_Mount(mtbl->mount);
+	}
+
+	return uffs_InitFileSystemObjects() == U_SUCC ? 0 : -1;
+}
+
+static int my_release_filesystem(void)
+{
+	uffs_MountTable *mtb;
+	int ret = 0;
+
+	// unmount parttions
+	for (mtb = &(demo_mount_table[0]); ret == 0 && mtb->mount != NULL; mtb++) {
+		ret = uffs_UnMount(mtb->mount);
+	}
+
+	// release objects
+	if (ret == 0)
+		ret = (uffs_ReleaseFileSystemObjects() == U_SUCC ? 0 : -1);
+
+	return ret;
 }
 
 /* application entry */
@@ -401,7 +423,7 @@ int main()
 	// ... my application codes ....
 	// read/write/create/delete files ...
 
-	uffs_ReleaseMountTable();
+	my_release_filesystem();
 
 	return 0;
 }
diff --git a/components/dfs/filesystems/uffs/src/example/static-mem-allocate.c b/components/dfs/filesystems/uffs/src/example/static-mem-allocate.c
index fb598ebc185ac4a0eb52f20d1d59a7365f626c38..a37409828d0760521a26f9446eeee1def291b90e 100644
--- a/components/dfs/filesystems/uffs/src/example/static-mem-allocate.c
+++ b/components/dfs/filesystems/uffs/src/example/static-mem-allocate.c
@@ -124,12 +124,17 @@ static int init_uffs_fs(void)
 	/* register mount table */
 	uffs_RegisterMountTable(mtbl);
 
-	return uffs_InitMountTable() == U_SUCC ? 0 : -1;
+	/* mount it */
+	uffs_Mount("/");
+
+	return uffs_InitFileSystemObjects() == U_SUCC ? 0 : -1;
 }
 
 static int release_uffs_fs(void)
 {
-	return uffs_ReleaseMountTable();
+	uffs_UnMount("/");
+
+	return uffs_ReleaseFileSystemObjects();
 }
 
 int main(int argc, char *argv[])
diff --git a/components/dfs/filesystems/uffs/src/inc/uffs/uffs_mtb.h b/components/dfs/filesystems/uffs/src/inc/uffs/uffs_mtb.h
index aa9be922229a18934670e40c57f1c8e9238ec275..8e00e52592ff940edab847725e6ebda693839845 100644
--- a/components/dfs/filesystems/uffs/src/inc/uffs/uffs_mtb.h
+++ b/components/dfs/filesystems/uffs/src/inc/uffs/uffs_mtb.h
@@ -49,24 +49,31 @@ extern "C"{
 
 
 typedef struct uffs_MountTableEntrySt {
-	uffs_Device *dev;
-	int start_block;
-	int end_block;
-	const char *mount;
+	uffs_Device *dev;		// UFFS 'device' - core internal data structure for partition
+	int start_block;		// partition start block
+	int end_block;			// partition end block ( if < 0, reserve space form the end of storage)
+	const char *mount;		// mount point
+	struct uffs_MountTableEntrySt *prev;
 	struct uffs_MountTableEntrySt *next;
 } uffs_MountTable;
 
-/** initialize registered mount table */
-URET uffs_InitMountTable(void);									
+/** Register mount entry, will be put at 'unmounted' list */
+int uffs_RegisterMountTable(uffs_MountTable *mtb);
 
-/** release registered mount table */
-URET uffs_ReleaseMountTable(void);								
+/** Remove mount entry from the list */
+int uffs_UnRegisterMountTable(uffs_MountTable *mtb);
 
-/** get registered mount table */
-uffs_MountTable * uffs_GetMountTable(void);						
+/** mount partition */
+int uffs_Mount(const char *mount);
 
-/** register mount table */
-int uffs_RegisterMountTable(uffs_MountTable *mtab);				
+/** unmount parttion */
+int uffs_UnMount(const char *mount);
+
+/** get mounted entry list */
+uffs_MountTable * uffs_MtbGetMounted(void);
+
+/** get unmounted entry list */
+uffs_MountTable * uffs_MtbGetUnMounted(void);
 
 /** get matched mount point from absolute path */
 int uffs_GetMatchedMountPointSize(const char *path);			
diff --git a/components/dfs/filesystems/uffs/src/inc/uffs/uffs_public.h b/components/dfs/filesystems/uffs/src/inc/uffs/uffs_public.h
index 59352874653d95a9dae754642c4adad995eb634b..d96c4449a248d2e1fc24597ef84d2236f82a1fa6 100644
--- a/components/dfs/filesystems/uffs/src/inc/uffs/uffs_public.h
+++ b/components/dfs/filesystems/uffs/src/inc/uffs/uffs_public.h
@@ -325,9 +325,8 @@ int uffs_DirEntryBufPutAll(uffs_Device *dev);
 URET uffs_InitDevice(uffs_Device *dev);
 URET uffs_ReleaseDevice(uffs_Device *dev);
 
-
-URET uffs_InitFlashClass(uffs_Device *dev);
-
+URET uffs_InitFileSystemObjects(void);
+URET uffs_ReleaseFileSystemObjects(void);
 
 
 #ifdef __cplusplus
diff --git a/components/dfs/filesystems/uffs/src/inc/uffs/uffs_tree.h b/components/dfs/filesystems/uffs/src/inc/uffs/uffs_tree.h
index 69df9420a2fa74ebd75c0941e902a5ff35435191..9f79316f9f01d92ab0ad52837e7dd86e6e3d4991 100644
--- a/components/dfs/filesystems/uffs/src/inc/uffs/uffs_tree.h
+++ b/components/dfs/filesystems/uffs/src/inc/uffs/uffs_tree.h
@@ -68,7 +68,7 @@ struct BlockListSt {	/* 12 bytes */
 	union {
 		u16 serial;    /* for suspended block list */
 		u8 need_check; /* for erased block list */
-	}u;
+	} u;
 };
 
 struct DirhSt {		/* 8 bytes */
diff --git a/components/dfs/filesystems/uffs/src/uffs/uffs_blockinfo.c b/components/dfs/filesystems/uffs/src/uffs/uffs_blockinfo.c
index 121fe361a29924820c1494c57e9bf0781fa811bb..89f75da0111c371724a4295dfeb2afa92b0e02d3 100644
--- a/components/dfs/filesystems/uffs/src/uffs/uffs_blockinfo.c
+++ b/components/dfs/filesystems/uffs/src/uffs/uffs_blockinfo.c
@@ -160,6 +160,7 @@ URET uffs_BlockInfoReleaseCache(uffs_Device *dev)
 		}
 		if (dev->mem.free) {
 			dev->mem.free(dev, dev->bc.mem_pool);
+			dev->mem.blockinfo_pool_size = 0;
 		}
 	}
 
diff --git a/components/dfs/filesystems/uffs/src/uffs/uffs_buf.c b/components/dfs/filesystems/uffs/src/uffs/uffs_buf.c
index a4f33af285225e3ab1d74b6d5e725cf6b7d69ee3..d6a3e456fb4f55450e4b1e6d724ddbad5c64f5a5 100644
--- a/components/dfs/filesystems/uffs/src/uffs/uffs_buf.c
+++ b/components/dfs/filesystems/uffs/src/uffs/uffs_buf.c
@@ -212,8 +212,10 @@ URET uffs_BufReleaseAll(uffs_Device *dev)
 		return U_FAIL;
 	}
 
-	if (dev->mem.free)
+	if (dev->mem.free) {
 		dev->mem.free(dev, dev->buf.pool);
+		dev->mem.pagebuf_pool_size = 0;
+	}
 
 	dev->buf.pool = NULL;
 	dev->buf.head = dev->buf.tail = NULL;
diff --git a/components/dfs/filesystems/uffs/src/uffs/uffs_find.c b/components/dfs/filesystems/uffs/src/uffs/uffs_find.c
index 9450a1992b953ac420945efa74622678b8bf94d9..d5aceed35ee76990639e18381ad5e1b72fab60cc 100644
--- a/components/dfs/filesystems/uffs/src/uffs/uffs_find.c
+++ b/components/dfs/filesystems/uffs/src/uffs/uffs_find.c
@@ -106,6 +106,7 @@ URET uffs_GetObjectInfo(uffs_Object *obj, uffs_ObjectInfo *info, int *err)
 			// this is ROOT. UFFS does not physically has root, just fake it ...
 			memset(info, 0, sizeof(uffs_ObjectInfo));
 			info->serial = obj->serial;
+			info->info.attr |= (FILE_ATTR_DIR | FILE_ATTR_WRITE);
 			if (err)
 				*err = UENOERR;
 			ret = U_SUCC;
diff --git a/components/dfs/filesystems/uffs/src/uffs/uffs_fs.c b/components/dfs/filesystems/uffs/src/uffs/uffs_fs.c
index 0a91565452bf5569a4eabb25c7cfed0a558ad8e4..1ef18b82196bdc2f8144dadcd5d767ed12a10a7b 100644
--- a/components/dfs/filesystems/uffs/src/uffs/uffs_fs.c
+++ b/components/dfs/filesystems/uffs/src/uffs/uffs_fs.c
@@ -966,8 +966,20 @@ static int do_WriteObject(uffs_Object *obj, const void *data, int len)
 			size = do_WriteNewBlock(obj, data ? (u8 *)data + len - remain : NULL,
 										remain, fnode->u.file.serial, fdn);
 
-			// Flush immediately, so that the new data node will be
+			//
+			// Flush the new block buffers immediately, so that the new data node will be
 			// created and put in the tree.
+			//
+			// But before do that, we need to make sure the previous
+			// data block (if exist) been flushed first.
+			//
+			if (fdn > 1) {
+				uffs_BufFlushGroup(dev, fnode->u.file.serial, fdn - 1);
+			}
+			else {
+				uffs_BufFlushGroup(dev, fnode->u.file.parent, fnode->u.file.serial);
+			}
+			// Now flush the new block.
 			uffs_BufFlushGroup(dev, fnode->u.file.serial, fdn);
 
 			if (size == 0) 
diff --git a/components/dfs/filesystems/uffs/src/uffs/uffs_init.c b/components/dfs/filesystems/uffs/src/uffs/uffs_init.c
index 5c630f5b92a770f3acbf5e4cebe4a3f56f1e3042..1a7b3fac4896fd737dd74c291f7d6a888a578e25 100644
--- a/components/dfs/filesystems/uffs/src/uffs/uffs_init.c
+++ b/components/dfs/filesystems/uffs/src/uffs/uffs_init.c
@@ -42,6 +42,7 @@
 #include "uffs/uffs_tree.h"
 #include "uffs/uffs_fs.h"
 #include "uffs/uffs_badblock.h"
+#include "uffs/uffs_utils.h"
 #include <string.h>
 
 #define PFX "init: "
@@ -178,3 +179,26 @@ ext:
 
 }
 
+URET uffs_InitFileSystemObjects(void)
+{
+	if (uffs_InitObjectBuf() == U_SUCC) {
+		if (uffs_DirEntryBufInit() == U_SUCC) {
+			uffs_InitGlobalFsLock();
+			return U_SUCC;
+		}
+	}
+
+	return U_FAIL;
+}
+
+URET uffs_ReleaseFileSystemObjects(void)
+{
+	if (uffs_ReleaseObjectBuf() == U_SUCC) {
+		if (uffs_DirEntryBufRelease() == U_SUCC) {
+			uffs_ReleaseGlobalFsLock();
+			return U_SUCC;
+		}
+	}
+
+	return U_FAIL;
+}
diff --git a/components/dfs/filesystems/uffs/src/uffs/uffs_mtb.c b/components/dfs/filesystems/uffs/src/uffs/uffs_mtb.c
index 377a300c0bc00cf89703ff718e18ea8190d09ea2..fd3f7f39aa54fa55f01f0fb9ad483c6f808bc6fa 100644
--- a/components/dfs/filesystems/uffs/src/uffs/uffs_mtb.c
+++ b/components/dfs/filesystems/uffs/src/uffs/uffs_mtb.c
@@ -47,110 +47,222 @@
 
 #define PFX "mtb : "
 
-static struct uffs_MountTableEntrySt *g_mtb_head = NULL;
+static struct uffs_MountTableEntrySt *m_head = NULL;		// list of mounted entries
+static struct uffs_MountTableEntrySt *m_free_head = NULL;	// list of unmounted entries
 
-uffs_MountTable * uffs_GetMountTable(void)
+/** Return mounted entries header */
+uffs_MountTable * uffs_MtbGetMounted(void)
 {
-	return g_mtb_head;
+	return m_head;
 }
 
-int uffs_RegisterMountTable(uffs_MountTable *mtab)
+/** Return unmounted entries header */
+uffs_MountTable * uffs_MtbGetUnMounted(void)
 {
-	uffs_MountTable *work = g_mtb_head;
+	return m_free_head;
+}
 
-	if (mtab == NULL) 
+/**
+ * \brief Register mount table
+ * \param mtb mount table entry
+ * \return 0 succ
+ *         -1 failed (e.g. already registered and mounted)
+ */
+int uffs_RegisterMountTable(uffs_MountTable *mtb)
+{
+	uffs_MountTable *work = NULL;
+	static int dev_num = 0;
+
+	if (mtb == NULL) 
 		return -1;
 
-	if (work == NULL) {
-		g_mtb_head = mtab;
-		return 0;
+	for (work = m_head; work; work = work->next) {
+		if (work == mtb)
+			return -1; // already mounted ?
 	}
 
-	while (work) {
-		if (mtab == work) {
-			/* already registered */
-			return 0;
-		}
-		if (work->next == NULL) {
-			work->next = mtab;
-			mtab->next = NULL;
-			return 0;
+	for (work = m_free_head; work; work = work->next) {
+		if (work == mtb)
+			return 0; // already registered.
+	}
+
+	/* replace the free head */
+	if (m_free_head)
+		m_free_head->prev = mtb;
+	mtb->prev = NULL;
+	mtb->next = m_free_head;
+	m_free_head = mtb;
+	
+	mtb->dev->dev_num = ++dev_num;
+
+	return 0;
+}
+
+/**
+ * \brief Remove mount entry from the table
+ * \param mtb mount table entry
+ * \return 0 removed succ
+ *         -1 entry in used or not in the 'unmounted' list
+ */
+int uffs_UnRegisterMountTable(uffs_MountTable *mtb)
+{
+	uffs_MountTable *work = NULL;
+
+	if (mtb == NULL)
+		return -1;
+
+	for (work = m_head; work; work = work->next) {
+		if (work == mtb)
+			return -1;	// in the mounted list ? busy, return
+	}
+
+	for (work = m_free_head; work; work = work->next) {
+		if (work == mtb) {
+			// found, remove it from the list
+			if (work->next)
+				work->next->prev = work->prev;
+			if (work->prev)
+				work->prev->next = work->next;
+			if (work == m_free_head)
+				m_free_head = work->next;
+
+			break;
 		}
-		work = work->next;
 	}
 
-	return -1;
+	return work ? 0 : -1;
 }
 
+static uffs_MountTable * uffs_GetMountTableByMountPoint(const char *mount, uffs_MountTable *head)
+{
+	uffs_MountTable *work = NULL;
 
-URET uffs_InitMountTable(void)
+	for (work = head; work; work = work->next) {
+		if (strcmp(work->mount, mount) == 0)
+			break;
+	}	
+	return work;
+}
+
+/**
+ * \brief mount partition
+ * \param[in] mount partition mount point
+ * \return 0 succ
+ *         <0 fail
+ *
+ * \note use uffs_RegisterMountTable() register mount entry before you can mount it.
+ *       mount point should ended with '/', e.g. '/sys/'
+ */
+int uffs_Mount(const char *mount)
 {
-	struct uffs_MountTableEntrySt *tbl = uffs_GetMountTable();
-	struct uffs_MountTableEntrySt *work;
-	int dev_num = 0;
-
-	for (work = tbl; work; work = work->next) {
-		uffs_Perror(UFFS_MSG_NOISY,
-					"init device for mount point %s ...",
-					work->mount);
-
-		work->dev->par.start = work->start_block;
-		if (work->end_block < 0) {
-			work->dev->par.end = 
-				work->dev->attr->total_blocks + work->end_block;
-		}
-		else {
-			work->dev->par.end = work->end_block;
-		}
+	uffs_MountTable *mtb;
 
-		if (work->dev->Init(work->dev) == U_FAIL) {
-			uffs_Perror(UFFS_MSG_SERIOUS,
-						"init device for mount point %s fail",
-						work->mount);
-			return U_FAIL;
-		}
+	if (uffs_GetMountTableByMountPoint(mount, m_head) != NULL) {
+		uffs_Perror(UFFS_MSG_NOISY,	"'%s' already mounted", mount);
+		return -1; // already mounted ?
+	}
+	
+	mtb = uffs_GetMountTableByMountPoint(mount, m_free_head);
+	if (mtb == NULL) {
+		uffs_Perror(UFFS_MSG_NOISY,	"'%s' not registered", mount);
+		return -1;	// not registered ?
+	}
 
-		uffs_Perror(UFFS_MSG_NOISY, "mount partiton: %d,%d",
-			work->dev->par.start, work->dev->par.end);
+	uffs_Perror(UFFS_MSG_NOISY,
+				"init device for mount point %s ...",
+				mtb->mount);
 
-		if (uffs_InitDevice(work->dev) != U_SUCC) {
-			uffs_Perror(UFFS_MSG_SERIOUS, "init device fail !");
-			return U_FAIL;
-		}
-		work->dev->dev_num = dev_num++;
+	mtb->dev->par.start = mtb->start_block;
+	if (mtb->end_block < 0) {
+		mtb->dev->par.end = 
+			mtb->dev->attr->total_blocks + mtb->end_block;
+	}
+	else {
+		mtb->dev->par.end = mtb->end_block;
 	}
 
-	if (uffs_InitObjectBuf() == U_SUCC) {
-		if (uffs_DirEntryBufInit() == U_SUCC) {
-			uffs_InitGlobalFsLock();
-			return U_SUCC;
-		}
+	if (mtb->dev->Init(mtb->dev) == U_FAIL) {
+		uffs_Perror(UFFS_MSG_SERIOUS,
+					"init device for mount point %s fail",
+					mtb->mount);
+		return -1;
+	}
+
+	uffs_Perror(UFFS_MSG_NOISY, "mount partiton: %d,%d",
+		mtb->dev->par.start, mtb->dev->par.end);
+
+	if (uffs_InitDevice(mtb->dev) != U_SUCC) {
+		uffs_Perror(UFFS_MSG_SERIOUS, "init device fail !");
+		return -1;
 	}
 
-	return U_FAIL;
+	/* now break it from unmounted list */
+	if (mtb->prev)
+		mtb->prev->next = mtb->next;
+	if (mtb->next)
+		mtb->next->prev = mtb->prev;
+	if (m_free_head == mtb)
+		m_free_head = mtb->next;
+
+	/* link to mounted list */
+	mtb->prev = NULL;
+	mtb->next = m_head;
+	if (m_head)
+		m_head->prev = mtb;
+	m_head = mtb;
+
+	return 0;
 }
 
-URET uffs_ReleaseMountTable(void)
+/**
+ * \brief unmount parttion
+ * \param[in] mount partition mount point
+ * \return 0 succ
+ *         <0 fail
+ */
+int uffs_UnMount(const char *mount)
 {
-	struct uffs_MountTableEntrySt *tbl = uffs_GetMountTable();
-	struct uffs_MountTableEntrySt *work;
+	uffs_MountTable *mtb = uffs_GetMountTableByMountPoint(mount, m_head);
 
-	for (work = tbl; work; work = work->next) {
-		uffs_ReleaseDevice(work->dev);
-		work->dev->Release(work->dev);
+	if (mtb == NULL) {
+		uffs_Perror(UFFS_MSG_NOISY,	"'%s' not mounted ?", mount);
+		return -1;  // not mounted ?
 	}
 
-	if (uffs_ReleaseObjectBuf() == U_SUCC) {
-		if (uffs_DirEntryBufRelease() == U_SUCC) {
-			uffs_ReleaseGlobalFsLock();
-			return U_SUCC;
-		}
+	if (uffs_GetMountTableByMountPoint(mount, m_free_head) != NULL) {
+		uffs_Perror(UFFS_MSG_NOISY,	"'%s' already unmounted ?", mount);
+		return -1;  // already unmounted ?
 	}
 
-	return U_FAIL;
-}
+	if (mtb->dev->ref_count != 0) {
+		uffs_Perror(UFFS_MSG_NORMAL, "Can't unmount '%s' - busy", mount);
+		return -1;
+	}
 
+	if (uffs_ReleaseDevice(mtb->dev) == U_FAIL) {
+		uffs_Perror(UFFS_MSG_NORMAL, "Can't release device for mount point '%s'", mount);
+		return -1;
+	}
+
+	mtb->dev->Release(mtb->dev);
+
+	// break from mounted list
+	if (mtb->prev)
+		mtb->prev->next = mtb->next;
+	if (mtb->next)
+		mtb->next->prev = mtb->prev;
+	if (mtb == m_head)
+		m_head = mtb->next;
 
+	// put to unmounted list
+	mtb->prev = NULL;
+	mtb->next = m_free_head;
+	if (m_free_head)
+		m_free_head->prev = mtb;
+	m_free_head = mtb;
+
+	return 0;
+}
 
 /**
  * find the matched mount point from a given full absolute path.
@@ -193,14 +305,11 @@ int uffs_GetMatchedMountPointSize(const char *path)
  */
 uffs_Device * uffs_GetDeviceFromMountPoint(const char *mount)
 {
-	struct uffs_MountTableEntrySt *devTab = uffs_GetMountTable();
+	uffs_MountTable *mtb = uffs_GetMountTableByMountPoint(mount, m_head);
 
-	while (devTab) {
-		if (strcmp(mount, devTab->mount) == 0) {
-			devTab->dev->ref_count++;
-			return devTab->dev;
-		}
-		devTab = devTab->next;
+	if (mtb) {
+		mtb->dev->ref_count++;
+		return mtb->dev;
 	}
 
 	return NULL;
@@ -215,15 +324,14 @@ uffs_Device * uffs_GetDeviceFromMountPoint(const char *mount)
  */
 uffs_Device * uffs_GetDeviceFromMountPointEx(const char *mount, int len)
 {
-	struct uffs_MountTableEntrySt *devTab = uffs_GetMountTable();
+	uffs_MountTable *work = NULL;
 
-	while (devTab) {
-		if (strlen(devTab->mount) == len &&
-				strncmp(mount, devTab->mount, len) == 0) {
-			devTab->dev->ref_count++;
-			return devTab->dev;
+	for (work = m_head; work; work = work->next) {
+		if (strlen(work->mount) == len &&
+				strncmp(mount, work->mount, len) == 0) {
+			work->dev->ref_count++;
+			return work->dev;
 		}
-		devTab = devTab->next;
 	}
 
 	return NULL;
@@ -239,13 +347,12 @@ uffs_Device * uffs_GetDeviceFromMountPointEx(const char *mount, int len)
  */
 const char * uffs_GetDeviceMountPoint(uffs_Device *dev)
 {
-	struct uffs_MountTableEntrySt * devTab = uffs_GetMountTable();
+	uffs_MountTable *work = NULL;
 
-	while (devTab) {
-		if (devTab->dev == dev) {
-			return devTab->mount;
+	for (work = m_head; work; work = work->next) {
+		if (work->dev == dev) {
+			return work->mount;
 		}
-		devTab = devTab->next;
 	}
 
 	return NULL;	
diff --git a/components/dfs/filesystems/uffs/src/utils/mkuffs.c b/components/dfs/filesystems/uffs/src/utils/mkuffs.c
index c0fc65e8f300fbe584605aceb17641e6333783b1..13103e9c1fb457a2a20c80aa54a32c8e5d2a3ed2 100644
--- a/components/dfs/filesystems/uffs/src/utils/mkuffs.c
+++ b/components/dfs/filesystems/uffs/src/utils/mkuffs.c
@@ -138,11 +138,13 @@ static int init_uffs_fs(void)
 		0,			// bc_caches - default
 		0,			// page_buffers - default
 		0,			// dirty_pages - default
-		0,			// dirty_groups - force 1
+		0,			// dirty_groups - default
 		0,			// reserved_free_blocks - default
 	};
 
-	if(bIsFileSystemInited) return -4;
+	if (bIsFileSystemInited)
+		return -4;
+
 	bIsFileSystemInited = 1;
 
 	while (mtbl->dev) {
@@ -157,13 +159,26 @@ static int init_uffs_fs(void)
 		mtbl++;
 	}
 
-	return uffs_InitMountTable() == U_SUCC ? 0 : -1;
+	// mount partitions
+	for (mtbl = &(conf_mounts[0]); mtbl->mount != NULL; mtbl++) {
+		uffs_Mount(mtbl->mount);
+	}
+
+	return uffs_InitFileSystemObjects() == U_SUCC ? 0 : -1;
 }
 
 static int release_uffs_fs(void)
 {
-	int ret;
-	ret = uffs_ReleaseMountTable();
+	int ret = 0;
+	uffs_MountTable *mtb;
+
+	for (mtb = &(conf_mounts[0]); ret == 0 && mtb->mount != NULL; mtb++) {
+		uffs_UnMount(mtb->mount);
+	}
+
+	if (ret == 0)
+		ret = (uffs_ReleaseFileSystemObjects() == U_SUCC ? 0 : -1);
+
 	return ret;
 }
 
@@ -357,6 +372,7 @@ static int parse_options(int argc, char *argv[])
     }
 
 	if (m_idx == 0) {
+		// if not given mount information, use default ('/' for whole partition)
 		parse_mount_point("/,0,-1", 0);
 	}