diff --git a/unmaintained/see_dat/see_dat.go b/unmaintained/see_dat/see_dat.go
index 5b81e48a1..17c494841 100644
--- a/unmaintained/see_dat/see_dat.go
+++ b/unmaintained/see_dat/see_dat.go
@@ -32,7 +32,6 @@ func (scanner *VolumeFileScanner4SeeDat) ReadNeedleBody() bool {
 
 func (scanner *VolumeFileScanner4SeeDat) VisitNeedle(n *needle.Needle, offset int64, needleHeader, needleBody []byte) error {
 	t := time.Unix(int64(n.AppendAtNs)/int64(time.Second), int64(n.AppendAtNs)%int64(time.Second))
-	// I0529 09:56:30 12560 see_dat.go:35] 4,17f03026 offset 8 size 17214(16.81 KiB) cookie 7f03026 appendedAt 2020-05-28 10:39:56.19197 +0800 CST
 	glog.V(0).Infof("%d,%s%x offset %d size %d(%s) cookie %x appendedAt %v",
 		*volumeId, n.Id, n.Cookie, offset, n.Size, util.BytesToHumanReadable(uint64(n.Size)), n.Cookie, t)
 	return nil
diff --git a/unmaintained/see_idx/see_idx.go b/unmaintained/see_idx/see_idx.go
index 84ea47083..47cbd291b 100644
--- a/unmaintained/see_idx/see_idx.go
+++ b/unmaintained/see_idx/see_idx.go
@@ -37,7 +37,6 @@ func main() {
 	defer indexFile.Close()
 
 	idx.WalkIndexFile(indexFile, func(key types.NeedleId, offset types.Offset, size uint32) error {
-		// key:1 offset:1 size:17214(16.81 KiB)
 		fmt.Printf("key:%v offset:%v size:%v(%v)\n", key, offset, size, util.BytesToHumanReadable(uint64(size)))
 		return nil
 	})