diff --git a/nvme_manager.cpp b/nvme_manager.cpp
index ccd2b60..e9e4328 100644
--- a/nvme_manager.cpp
+++ b/nvme_manager.cpp
@@ -164,7 +164,6 @@
                          bool success,
                          const phosphor::nvme::Nvme::NVMeData& nvmeData)
 {
-    static std::unordered_map<std::string, bool> isError;
 
     if (success)
     {
@@ -209,7 +208,8 @@
 }
 
 /** @brief Get NVMe info over smbus  */
-bool getNVMeInfobyBusID(int busID, phosphor::nvme::Nvme::NVMeData& nvmeData)
+bool Nvme::getNVMeInfobyBusID(int busID,
+                              phosphor::nvme::Nvme::NVMeData& nvmeData)
 {
     nvmeData.present = true;
     nvmeData.vendor = "";
@@ -230,8 +230,6 @@
 
     auto init = smbus.smbusInit(busID);
 
-    static std::unordered_map<int, bool> isErrorSmbus;
-
     if (init == -1)
     {
         if (isErrorSmbus[busID] != true)
@@ -578,8 +576,6 @@
     std::string devPwrGoodPath;
     std::string inventoryPath;
 
-    static std::unordered_map<std::string, bool> isErrorPower;
-
     for (auto config : configs)
     {
         NVMeData nvmeData;
diff --git a/nvme_manager.hpp b/nvme_manager.hpp
index 97ef204..78eabe3 100644
--- a/nvme_manager.hpp
+++ b/nvme_manager.hpp
@@ -124,6 +124,10 @@
 
     void createNVMeInventory();
 
+    /** @brief read NVMe information via Smbus */
+    bool getNVMeInfobyBusID(int busID,
+                            phosphor::nvme::Nvme::NVMeData& nvmeData);
+
     /** @brief read and update NVME data to dbus */
     void readNvmeData(NVMeConfig& config);
 
@@ -137,6 +141,13 @@
 
     std::vector<phosphor::nvme::Nvme::NVMeConfig> configs;
 
+    /** @brief error status for Smbus */
+    std::unordered_map<int, bool> isErrorSmbus;
+    /** @brief error status for LED */
+    std::unordered_map<std::string, bool> isError;
+    /** @brief error status for NVMe power*/
+    std::unordered_map<std::string, bool> isErrorPower;
+
     /** @brief Set up initial configuration value of NVMe */
     void init();
     /** @brief Monitor NVMe drives every one second  */