diff --git a/CHANGELOG.md b/CHANGELOG.md
index aeb2cbf..d6e5a92 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -30,6 +30,7 @@ For major (breaking) changes - version 3 and 2 see end of page.
 
 | Version        | Date           | Comment  |
 | -------------- | -------------- | -------- |
+| 4.23.1         | 2020-03-11     | `diskLayout()` optimized detection linux |
 | 4.23.0         | 2020-03-08     | `versions()` added param to specify which program/lib versions to detect |
 | 4.22.7         | 2020-03-08     | `diskLayout()` fixed linux |
 | 4.22.6         | 2020-03-08     | `network()` fixed DHCP linux|
diff --git a/docs/history.html b/docs/history.html
index 90e6693..91d8124 100644
--- a/docs/history.html
+++ b/docs/history.html
@@ -83,6 +83,11 @@
                   </tr>
                 </thead>
                 <tbody>
+                  <tr>
+                    <th scope="row">4.23.1</th>
+                    <td>2020-03-11</td>
+                    <td><span class="code">diskLayout()</span> optimized detection (linux)</td>
+                  </tr>
                   <tr>
                     <th scope="row">4.23.0</th>
                     <td>2020-03-08</td>
diff --git a/docs/index.html b/docs/index.html
index 60d79e7..5f3561e 100644
--- a/docs/index.html
+++ b/docs/index.html
@@ -168,7 +168,7 @@
       <img class="logo" src="assets/logo.png">
       <div class="title">systeminformation</div>
       <div class="subtitle"><span id="typed"></span></div>
-      <div class="version">Current Version: <span id="version">4.23.0</span></div>
+      <div class="version">Current Version: <span id="version">4.23.1</span></div>
       <button class="btn btn-light" onclick="location.href='https://github.com/sebhildebrandt/systeminformation'">View on Github <i class=" fab fa-github"></i></button>
     </div>
     <div class="down">
@@ -207,7 +207,7 @@
         <div class="title">Downloads last month</div>
       </div>
       <div class="col-xl-4 col-lg-4 col-md-4 col-12">
-        <div class="numbers">251</div>
+        <div class="numbers">255</div>
         <div class="title">Dependends</div>
       </div>
     </div>
diff --git a/lib/filesystem.js b/lib/filesystem.js
index f64c513..19ff183 100755
--- a/lib/filesystem.js
+++ b/lib/filesystem.js
@@ -747,7 +747,7 @@ function diskLayout(callback) {
               try {
                 const outJSON = JSON.parse(out);
                 if (outJSON && {}.hasOwnProperty.call(outJSON, 'blockdevices')) {
-                  devices = outJSON.blockdevices.filter(item => { return (item.group === 'disk' || item.type === 'disk') && item.size > 0 && (item.model !== null || (item.mountpoint === null && item.label === null && item.fstype === null)); });
+                  devices = outJSON.blockdevices.filter(item => { return (item.group === 'disk' || item.type === 'disk') && item.size > 0 && (item.model !== null || (item.mountpoint === null && item.label === null && item.fstype === null && item.parttype === null)); });
                 }
               } catch (e) {
                 // fallback to older version of lsblk