storage/file.go | 1 +

diff --git a/storage/file.go b/storage/file.go
index f4ab0913c4aa6d7b17130d822c138e3253e7991c..48a14312e61c2f318c0ffce6a72976e80f2cd4ce 100644
--- a/storage/file.go
+++ b/storage/file.go
@@ -200,6 +200,7 @@ 		if err != nil {
 			return
 		}
 		n1, err = f.WriteAt(p[:n1], off)
+		// TODO: On some systems, write errors can be delayed until the Close.
 		f.Close()
 		if err != nil {
 			return