diff --git a/archive/pfs/controller/chunk.go b/archive/pfs/controller/chunk.go
new file mode 100644
index 0000000..5fb694f
--- /dev/null
+++ b/archive/pfs/controller/chunk.go
@@ -0,0 +1,18 @@
+package controller
+
+import (
+	"github.com/giolekva/pcloud/pfs/api"
+)
+
+type chunkServerStatus int
+
+const (
+	Healthy chunkServerStatus = iota
+	UNREACHABLE
+)
+
+type chunkServer struct {
+	address string
+	status  chunkServerStatus
+	chunks  map[string]api.ChunkStatus
+}