diff --git a/main.py b/main.py
old mode 100644
new mode 100755
index dcfe999..7d9fc9b
--- a/main.py
+++ b/main.py
@@ -1,6 +1,48 @@
+#!/usr/bin/python3
 import json
+from threading import Thread, Lock
 from flask import Flask, jsonify
 import subprocess
+from datetime import datetime
+import time
+import psutil
+
+class Disk:
+    def __init__(self, values, updated) -> None:
+        self.sdiskio = values
+        self.updated = updated
+        self.read_rate = 0
+        self.read_rate = 0
+
+    def update(self, values, updated) -> None:
+        time_diff = updated - self.updated
+        read_diff = values.read_bytes - self.sdiskio.read_bytes
+        wrtn_diff = values.write_bytes - self.sdiskio.write_bytes
+
+        self.read_rate = read_diff/time_diff.total_seconds()
+        self.wrtn_rate = wrtn_diff/time_diff.total_seconds()
+
+        self.sdiskio = values
+        self.updated = updated
+
+disk_dict = dict()
+mutex = Lock()
+def disk_io():
+    disks = psutil.disk_io_counters(perdisk=True)
+    updated = datetime.now()
+    
+    with mutex:
+        for disk in disks:
+            if disk not in disk_dict:
+                disk_dict[disk] = Disk(disks[disk], updated)
+            else:
+                disk_dict[disk].update(disks[disk], updated)
+
+def disk_thread_targ():
+    print("Disk thread started.")
+    while True:
+        disk_io()
+        time.sleep(1)
 
 def remove_empty_lists(item):
     if isinstance(item, list):
@@ -13,7 +55,10 @@ def remove_empty_lists(item):
     else:
         return item
     
+print("App started.")
 app = Flask(__name__)
+t = Thread(target=disk_thread_targ)
+t.start()
 
 @app.route("/")
 def hello():
@@ -61,7 +106,14 @@ def temps():
 @app.route("/api/disks")
 def disks():
     out = '{"disks":[' + subprocess.getoutput("df -P --total -x squashfs | awk \'BEGIN {printf\"{\\\"discarray\\\":[\"}{if($1==\"Filesystem\")next;if(a)printf\",\";printf\"{\\\"mount\\\":\\\"\"$6\"\\\",\\\"size\\\":\\\"\"$2\"\\\",\\\"used\\\":\\\"\"$3\"\\\",\\\"avail\\\":\\\"\"$4\"\\\",\\\"use%\\\":\\\"\"$5\"\\\"}\";a++;}END{print\"]}\";}\'")
-    out += "," + subprocess.run(["iostat", "-d", "-o", "JSON"], capture_output = True, text = True).stdout + "]}"
+    
+    dict_dict = dict()
+    with mutex:
+        for disk in disk_dict:
+            dict_dict[disk] = dict(disk_dict[disk].__dict__)
+            dict_dict[disk].pop('updated')
+
+    out += "," + json.dumps(dict_dict) + "]}"
     return jsonify(remove_empty_lists(json.loads(out)))
 
 @app.route("/api/memory")
@@ -100,4 +152,4 @@ def network():
         elif "inet6" in line:
             lan_dict[interface]["inet6"] = line.split()[1].split("/")[0]
 
-    return jsonify({"wan": wan_out, "lan": lan_dict})
\ No newline at end of file
+    return jsonify({"wan": wan_out, "lan": lan_dict})