Update syno_hdd_db.sh

Fixed bug where "M.2 volume support already enabled" message appeared when NAS had no M.2 drives.

syno_hdd_db.sh

@@ -49,6 +49,8 @@
 #
 # Fixed bug where removable drives were being detected and added to drive database.
 #
+# Fixed bug where "M.2 volume support already enabled" message appeared when NAS had no M.2 drives.
+#
 #
 # Added check that M.2 volume support is enabled (on supported models).
 #
@@ -380,11 +382,11 @@ if [[ ${#nvmelist[@]} -gt "0" ]]; then
 fi
 
 # Check nvmes array isn't empty
-if [[ ${#nvmes[@]} -eq "0" ]]; then
+if [[ $m2 != "no" ]]; then
-    if [[ $m2 != "no" ]]; then
+    if [[ ${#nvmes[@]} -eq "0" ]]; then
         echo -e "No M.2 drives found\n"
-    fi
+    else    
-else    
+        m2exists="yes"
         echo "M.2 drive models found: ${#nvmes[@]}"
         num="0"
         while [[ $num -lt "${#nvmes[@]}" ]]; do
@@ -392,6 +394,7 @@ else
             num=$((num +1))
         done
         echo
+    fi
 fi
 
 
@@ -608,30 +611,35 @@ else
 fi
 
 
-# Check m2 volume support enabled
+# Enable m2 volume support
-smp=support_m2_pool
+if [[ $m2 != "no" ]]; then
-setting="$(get_key_value $synoinfo ${smp})"
+    if [[ $m2exists == "yes" ]]; then
-enabled=""
+        # Check if m2 volume support is enabled
-if [[ ! $setting ]]; then
+        smp=support_m2_pool
+        setting="$(get_key_value $synoinfo ${smp})"
+        enabled=""
+        if [[ ! $setting ]]; then
             # Add support_m2_pool"yes"
             echo 'support_m2_pool="yes"' >> "$synoinfo"
             enabled="yes"
-elif [[ $setting == "no" ]]; then
+        elif [[ $setting == "no" ]]; then
             # Change support_m2_pool"no" to "yes"
             sed -i "s/${smp}=\"no\"/${smp}=\"yes\"/" "$synoinfo"
             enabled="yes"
-elif [[ $setting == "yes" ]]; then
+        elif [[ $setting == "yes" ]]; then
             echo -e "\nM.2 volume support already enabled."
-fi
+        fi
 
-# Check if we enabled m2 volume support
+        # Check if we enabled m2 volume support
-setting="$(get_key_value $synoinfo ${smp})"
+        setting="$(get_key_value $synoinfo ${smp})"
-if [[ $enabled == "yes" ]]; then
+        if [[ $enabled == "yes" ]]; then
             if [[ $setting == "yes" ]]; then
                 echo -e "\nEnabled M.2 volume support."
             else
                 echo -e "${Error}ERROR${Off} Failed to enable m2 volume support!"
             fi
+        fi
+    fi
 fi