diff --git a/core/rawdb/freezer_table.go b/core/rawdb/freezer_table.go
index d1ece414bb..0239f7d2eb 100644
--- a/core/rawdb/freezer_table.go
+++ b/core/rawdb/freezer_table.go
@@ -122,7 +122,7 @@ func newCustomTable(path string, name string, readMeter metrics.Meter, writeMete
 		// compressed idx
 		idxName = fmt.Sprintf("%s.cidx", name)
 	}
-	offsets, err := os.OpenFile(filepath.Join(path, idxName), os.O_RDWR|os.O_CREATE|os.O_APPEND, 0644)
+	offsets, err := os.OpenFile(filepath.Join(path, idxName), os.O_RDWR|os.O_CREATE, 0644)
 	if err != nil {
 		return nil, err
 	}
@@ -188,7 +188,7 @@ func (t *freezerTable) repair() error {
 
 	t.index.ReadAt(buffer, offsetsSize-indexEntrySize)
 	lastIndex.unmarshalBinary(buffer)
-	t.head, err = t.openFile(lastIndex.filenum, os.O_RDWR|os.O_CREATE|os.O_APPEND)
+	t.head, err = t.openFile(lastIndex.filenum, os.O_RDWR|os.O_CREATE)
 	if err != nil {
 		return err
 	}
@@ -223,7 +223,7 @@ func (t *freezerTable) repair() error {
 			if newLastIndex.filenum != lastIndex.filenum {
 				// release earlier opened file
 				t.releaseFile(lastIndex.filenum)
-				t.head, err = t.openFile(newLastIndex.filenum, os.O_RDWR|os.O_CREATE|os.O_APPEND)
+				t.head, err = t.openFile(newLastIndex.filenum, os.O_RDWR|os.O_CREATE)
 				if stat, err = t.head.Stat(); err != nil {
 					// TODO, anything more we can do here?
 					// A data file has gone missing...
@@ -269,11 +269,11 @@ func (t *freezerTable) preopen() (err error) {
 		}
 	}
 	// Open head in read/write
-	t.head, err = t.openFile(t.headId, os.O_RDWR|os.O_CREATE|os.O_APPEND)
+	t.head, err = t.openFile(t.headId, os.O_RDWR|os.O_CREATE)
 	return err
 }
 
-// truncate discards any recent data above the provided threashold number.
+// truncate discards any recent data above the provided threshold number.
 func (t *freezerTable) truncate(items uint64) error {
 	t.lock.Lock()
 	defer t.lock.Unlock()
@@ -299,7 +299,7 @@ func (t *freezerTable) truncate(items uint64) error {
 	if expected.filenum != t.headId {
 		// If already open for reading, force-reopen for writing
 		t.releaseFile(expected.filenum)
-		newHead, err := t.openFile(expected.filenum, os.O_RDWR|os.O_CREATE|os.O_APPEND)
+		newHead, err := t.openFile(expected.filenum, os.O_RDWR|os.O_CREATE)
 		if err != nil {
 			return err
 		}
@@ -435,6 +435,10 @@ func (t *freezerTable) Append(item uint64, blob []byte) error {
 
 	defer t.lock.RUnlock()
 
+	if _, err := t.head.Seek(0, 2); err != nil {
+		return err
+	}
+
 	if _, err := t.head.Write(blob); err != nil {
 		return err
 	}
@@ -444,6 +448,7 @@ func (t *freezerTable) Append(item uint64, blob []byte) error {
 		offset:  newOffset,
 	}
 	// Write indexEntry
+	t.index.Seek(0, 2)
 	t.index.Write(idx.marshallBinary())
 	t.writeMeter.Mark(int64(bLen + indexEntrySize))
 	atomic.AddUint64(&t.items, 1)