diff --git a/ceph/osd/OBFSStore.cc b/ceph/osd/OBFSStore.cc
index 77dbbc8d9d2..b0e8bef2f97 100644
--- a/ceph/osd/OBFSStore.cc
+++ b/ceph/osd/OBFSStore.cc
@@ -39,18 +39,19 @@ OBFSStore::OBFSStore(int whoami, char *param, char *dev)
 int OBFSStore::init(void)
 {
 	dout(0) << "OBFS init!" << endl;
-	if ((this->bdev_id = device_open(this->dev, 0)) < 0) {
+	if ((this->bdev_id = device_open(this->dev, O_RDWR)) < 0) {
 		dout(0) << "device open FAILED on " << this->dev << ", errno " << errno << endl;
 		return -1;
 	}
 
-	this->mounted = uofs_mount(this->bdev_id);
+	this->mkfs();
+	this->mounted = uofs_mount(this->bdev_id, this->whoami);
 	switch (this->mounted) {
 		case -1:
 			this->mkfs();
 			//retry to mount
 			dout(0) << "remount the OBFS" << endl;
-			this->mounted = uofs_mount(this->bdev_id);
+			this->mounted = uofs_mount(this->bdev_id, this->whoami);
 			assert(this->mounted >= 0);
 			break;
 		case -2: 
@@ -66,7 +67,7 @@ int OBFSStore::init(void)
 	if (this->mounted >= 0) 
 		dout(0) << "successfully mounted!" << endl;
 	else
-		dout(0) << "error in mounting!" << endl;
+		dout(0) << "error in mounting obfsstore!" << endl;
 	
 	return 0;
 }
@@ -77,17 +78,17 @@ int OBFSStore::mkfs(void)
 		bd_ratio                = 10,
 		reg_size_mb             = 256,
 		sb_size_kb              = 4,
-		lb_size_kb              = 512,
+		lb_size_kb              = 1024,
 		nr_hash_table_buckets   = 1023,
 		delay_allocation        = 0,
 		flush_interval		= 5;
 	FILE	*param;
 	
 
-	dout(0) << "OBFS.mkfs!" << endl;
 	if (this->mounted >= 0)
 		return 0;
 
+	dout(0) << "OBFS.mkfs!" << endl;
 	if (strlen(this->param) > 0) {
 		param = fopen(this->param, "r");
 		if (param) {
@@ -107,7 +108,7 @@ int OBFSStore::mkfs(void)
 		dout(0) << "use default parameters" << endl;
 
 	if (this->bdev_id <= 0)
-		if ((this->bdev_id = device_open(this->dev, 0)) < 0) {
+		if ((this->bdev_id = device_open(this->dev, O_RDWR)) < 0) {
 			dout(0) << "device open FAILED on "<< this->dev <<", errno " << errno << endl;
 			return -1;
 		}
@@ -115,7 +116,7 @@ int OBFSStore::mkfs(void)
 	dout(0) << "start formating!" << endl;
 
 	uofs_format(this->bdev_id, donode_size_byte, bd_ratio, (reg_size_mb << 20), (sb_size_kb << 10), 
-			(lb_size_kb << 10), nr_hash_table_buckets, delay_allocation, flush_interval);
+			(lb_size_kb << 10), nr_hash_table_buckets, delay_allocation, flush_interval, this->whoami);
 
 	dout(0) << "formatting complete!" << endl;
 	return 0;
@@ -131,35 +132,42 @@ int OBFSStore::finalize(void)
 
 bool OBFSStore::exists(object_t oid)
 {
+	dout(0) << "calling function exists!" << endl;
 	return uofs_exist(oid);
 }
 
 int OBFSStore::stat(object_t oid, struct stat *st)
 {
+	dout(0) << "calling function stat!" << endl;
 }
 
 int OBFSStore::remove(object_t oid)
 {
+	dout(0) << "calling remove function!" << endl;
 	return uofs_del(oid);
 }
 
 int OBFSStore::truncate(object_t oid, off_t size)
 {
+	dout(0) << "calling truncate function!" << endl;
 	//return uofs_truncate(oid, size);
 }
 
 int OBFSStore::read(object_t oid, size_t len, 
 		    off_t offset, char *buffer)
 {
+	dout(0) << "calling read function!" << endl;
 	return uofs_read(oid, buffer, offset, len);
 }
 
 int OBFSStore::write(object_t oid, size_t len,
 		     off_t offset, char *buffer, bool fsync)
 {
-	int ret;
+	int ret, sync = 0;
 	
-	ret = uofs_write(oid, buffer, offset, len);
+	//dout(0) << "calling write function!" << endl;
+	if (fsync) sync = 1;
+	ret = uofs_write(oid, buffer, offset, len, sync);
 	if (fsync)
 		ret += uofs_sync(oid);