diff --git a/options.go b/options.go
index da5393f..0cc4050 100644
--- a/options.go
+++ b/options.go
@@ -47,7 +47,7 @@ const (
 
 var DefaultOptions = Options{
 	DirPath:        os.TempDir(),
-	SegmentSize:    GB,
+	SegmentSize:    1 * GB,
 	SegmentFileExt: ".SEG",
 	Sync:           false,
 	BytesPerSync:   0,
diff --git a/segment.go b/segment.go
index c3fde85..18e271c 100644
--- a/segment.go
+++ b/segment.go
@@ -100,7 +100,7 @@ func putBuffer(buf []byte) {
 	blockPool.Put(buf)
 }
 
-// openSegmentFile a new segment file.
+// openSegmentFile open a segment file.
 func openSegmentFile(dirPath, extName string, id uint32) (*segment, error) {
 	fd, err := os.OpenFile(
 		SegmentFileName(dirPath, extName, id),
@@ -154,10 +154,10 @@ func (seg *segment) Sync() error {
 // Remove removes the segment file.
 func (seg *segment) Remove() error {
 	if !seg.closed {
-		seg.closed = true
 		if err := seg.fd.Close(); err != nil {
 			return err
 		}
+		seg.closed = true
 	}
 
 	return os.Remove(seg.fd.Name())
@@ -168,9 +168,11 @@ func (seg *segment) Close() error {
 	if seg.closed {
 		return nil
 	}
-
+	if err := seg.fd.Close(); err != nil {
+		return err
+	}
 	seg.closed = true
-	return seg.fd.Close()
+	return nil
 }
 
 // Size returns the size of the segment file.