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 [[ ${#nvmes[@]} -eq "0" ]]; then
         echo -e "No M.2 drives found\n"
-    fi
     else    
+        m2exists="yes"
         echo "M.2 drive models found: ${#nvmes[@]}"
         num="0"
         while [[ $num -lt "${#nvmes[@]}" ]]; do
@@ -393,6 +395,7 @@ else
         done
         echo
     fi
+fi
 
 
 # M.2 card db files
@@ -608,7 +611,10 @@ else
 fi
 
 
-# Check m2 volume support enabled
+# Enable m2 volume support
+if [[ $m2 != "no" ]]; then
+    if [[ $m2exists == "yes" ]]; then
+        # Check if m2 volume support is enabled
         smp=support_m2_pool
         setting="$(get_key_value $synoinfo ${smp})"
         enabled=""
@@ -633,6 +639,8 @@ if [[ $enabled == "yes" ]]; then
                 echo -e "${Error}ERROR${Off} Failed to enable m2 volume support!"
             fi
         fi
+    fi
+fi
 
 
 # Edit synoinfo.conf to prevent drive db updates