fs: Enable shutdown test with faulty disks (#3380)

cmd/fs-v1_test.go

@@ -126,9 +126,8 @@ func TestFSShutdown(t *testing.T) {
 	}
 	removeAll(disk)
 
-	// FIXME: Check why Shutdown returns success when second posix call returns faulty disk error
 	// Test Shutdown with faulty disk
-	/* for i := 1; i <= 5; i++ {
+	for i := 1; i <= 5; i++ {
 		fs, disk := prepareTest()
 		fs.DeleteObject(bucketName, objectName)
 		fsStorage := fs.storage.(*retryStorage)
@@ -137,7 +136,7 @@ func TestFSShutdown(t *testing.T) {
 			t.Fatal(i, ", Got unexpected fs shutdown error: ", err)
 		}
 		removeAll(disk)
-	} */
+	}
 }
 
 // TestFSLoadFormatFS - test loadFormatFS with healty and faulty disks