diff --git a/extern/sector-storage/stores/http_handler.go b/extern/sector-storage/stores/http_handler.go
index 845bfdd7b1a..5996392d81f 100644
--- a/extern/sector-storage/stores/http_handler.go
+++ b/extern/sector-storage/stores/http_handler.go
@@ -2,7 +2,6 @@ package stores
 
 import (
 	"encoding/json"
-	"io"
 	"net/http"
 	"os"
 	"strconv"
@@ -139,17 +138,12 @@ func (handler *FetchHandler) remoteGetSector(w http.ResponseWriter, r *http.Requ
 			return
 		}
 
-		rd, err := tarutil.TarDirectory(path)
-		if err != nil {
-			log.Errorf("%+v", err)
-			w.WriteHeader(500)
-			return
-		}
-
 		w.Header().Set("Content-Type", "application/x-tar")
 		w.WriteHeader(200)
-		if _, err := io.CopyBuffer(w, rd, make([]byte, CopyBuf)); err != nil {
-			log.Errorf("%+v", err)
+
+		err := tarutil.TarDirectory(path, w, make([]byte, CopyBuf))
+		if err != nil {
+			log.Errorf("send tar: %+v", err)
 			return
 		}
 	} else {
diff --git a/extern/sector-storage/stores/remote.go b/extern/sector-storage/stores/remote.go
index a5e84bc19b4..7935556a988 100644
--- a/extern/sector-storage/stores/remote.go
+++ b/extern/sector-storage/stores/remote.go
@@ -281,7 +281,7 @@ func (r *Remote) fetch(ctx context.Context, url, outname string) error {
 
 	switch mediatype {
 	case "application/x-tar":
-		return tarutil.ExtractTar(resp.Body, outname)
+		return tarutil.ExtractTar(resp.Body, outname, make([]byte, CopyBuf))
 	case "application/octet-stream":
 		f, err := os.Create(outname)
 		if err != nil {
diff --git a/extern/sector-storage/tarutil/systar.go b/extern/sector-storage/tarutil/systar.go
index 2329aafc7b3..eb958fa02ad 100644
--- a/extern/sector-storage/tarutil/systar.go
+++ b/extern/sector-storage/tarutil/systar.go
@@ -14,7 +14,7 @@ import (
 
 var log = logging.Logger("tarutil") // nolint
 
-func ExtractTar(body io.Reader, dir string) error {
+func ExtractTar(body io.Reader, dir string, buf []byte) error {
 	if err := os.MkdirAll(dir, 0755); err != nil { // nolint
 		return xerrors.Errorf("mkdir: %w", err)
 	}
@@ -38,7 +38,7 @@ func ExtractTar(body io.Reader, dir string) error {
 
 		// This data is coming from a trusted source, no need to check the size.
 		//nolint:gosec
-		if _, err := io.Copy(f, tr); err != nil {
+		if _, err := io.CopyBuffer(f, tr, buf); err != nil {
 			return err
 		}
 
@@ -48,17 +48,7 @@ func ExtractTar(body io.Reader, dir string) error {
 	}
 }
 
-func TarDirectory(dir string) (io.ReadCloser, error) {
-	r, w := io.Pipe()
-
-	go func() {
-		_ = w.CloseWithError(writeTarDirectory(dir, w))
-	}()
-
-	return r, nil
-}
-
-func writeTarDirectory(dir string, w io.Writer) error {
+func TarDirectory(dir string, w io.Writer, buf []byte) error {
 	tw := tar.NewWriter(w)
 
 	files, err := ioutil.ReadDir(dir)
@@ -81,7 +71,7 @@ func writeTarDirectory(dir string, w io.Writer) error {
 			return xerrors.Errorf("opening %s for reading: %w", file.Name(), err)
 		}
 
-		if _, err := io.Copy(tw, f); err != nil {
+		if _, err := io.CopyBuffer(tw, f, buf); err != nil {
 			return xerrors.Errorf("copy data for file %s: %w", file.Name(), err)
 		}