mux router cannot handle "/" correctly. switching it off for volume

servers

go/util/file_util.go

@@ -0,0 +1,23 @@
+package util
+
+import (
+  "code.google.com/p/weed-fs/go/glog"
+	"errors"
+	"os"
+)
+
+func TestFolderWritable(folder string) (err error) {
+	fileInfo, err := os.Stat(folder)
+	if err != nil {
+		return err
+	}
+	if !fileInfo.IsDir() {
+		return errors.New("Not a valid folder!")
+	}
+	perm := fileInfo.Mode().Perm()
+	glog.V(0).Infoln("Folder", folder, "Permission:", perm)
+	if 0200&perm != 0 {
+		return nil
+	}
+	return errors.New("Not writable!")
+}