diff --git a/pom.xml b/pom.xml
index 65ad566c4..bf8133186 100644
--- a/pom.xml
+++ b/pom.xml
@@ -155,11 +155,6 @@ THE SOFTWARE.
       <groupId>org.jenkins-ci.plugins.workflow</groupId>
       <artifactId>workflow-step-api</artifactId>
     </dependency>
-    <dependency>
-      <groupId>org.kohsuke</groupId>
-      <artifactId>libzfs</artifactId>
-      <version>0.8</version>
-    </dependency>
     <dependency>
       <groupId>io.jenkins</groupId>
       <artifactId>configuration-as-code</artifactId>
diff --git a/src/main/java/hudson/plugins/ec2/ebs/ZPoolExpandNotice.java b/src/main/java/hudson/plugins/ec2/ebs/ZPoolExpandNotice.java
deleted file mode 100644
index a11eb5a9e..000000000
--- a/src/main/java/hudson/plugins/ec2/ebs/ZPoolExpandNotice.java
+++ /dev/null
@@ -1,54 +0,0 @@
-/*
- * The MIT License
- *
- * Copyright (c) 2004-, Kohsuke Kawaguchi, Sun Microsystems, Inc., and a number of other of contributors
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"), to deal
- * in the Software without restriction, including without limitation the rights
- * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- * copies of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in
- * all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
- * THE SOFTWARE.
- */
-package hudson.plugins.ec2.ebs;
-
-import hudson.Extension;
-import hudson.model.AdministrativeMonitor;
-
-/**
- * {@link AdministrativeMonitor} that tells the user that ZFS pool is filling up and they need to add more storage.
- *
- * @author Kohsuke Kawaguchi
- */
-@Extension
-public class ZPoolExpandNotice extends AdministrativeMonitor {
-    /**
-     * Set by {@link ZPoolMonitor}.
-     */
-    /* package */ boolean activated = false;
-
-    public ZPoolExpandNotice() {
-        super("zpool.ebs");
-    }
-
-    @Override
-    public boolean isActivated() {
-        return activated;
-    }
-
-    @Override
-    public String getDisplayName() {
-        return Messages.ZPoolExpandNotice_DisplayName();
-    }
-}
diff --git a/src/main/java/hudson/plugins/ec2/ebs/ZPoolMonitor.java b/src/main/java/hudson/plugins/ec2/ebs/ZPoolMonitor.java
deleted file mode 100644
index 68dbb79e5..000000000
--- a/src/main/java/hudson/plugins/ec2/ebs/ZPoolMonitor.java
+++ /dev/null
@@ -1,91 +0,0 @@
-/*
- * The MIT License
- *
- * Copyright (c) 2004-, Kohsuke Kawaguchi, Sun Microsystems, Inc., and a number of other of contributors
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"), to deal
- * in the Software without restriction, including without limitation the rights
- * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- * copies of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in
- * all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
- * THE SOFTWARE.
- */
-package hudson.plugins.ec2.ebs;
-
-import hudson.Extension;
-import hudson.model.AdministrativeMonitor;
-import hudson.model.PeriodicWork;
-import java.io.IOException;
-import java.net.URL;
-import java.util.concurrent.TimeUnit;
-import jenkins.model.Jenkins;
-import org.jvnet.solaris.libzfs.LibZFS;
-import org.jvnet.solaris.libzfs.ZFSFileSystem;
-import org.jvnet.solaris.libzfs.ZFSPool;
-
-/**
- * Once an hour, check if the main zpool is that hosts $HUDSON_HOME has still enough free space.
- *
- * @author Kohsuke Kawaguchi
- */
-@Extension
-public class ZPoolMonitor extends PeriodicWork {
-    private static Boolean isInsideEC2;
-
-    @Override
-    public long getRecurrencePeriod() {
-        return TimeUnit.HOURS.toMillis(1);
-    }
-
-    @Override
-    protected void doRun() {
-        ZPoolExpandNotice zen = AdministrativeMonitor.all().get(ZPoolExpandNotice.class);
-        Jenkins jenkinsInstance = Jenkins.getInstanceOrNull();
-        ZFSFileSystem fs = null;
-        try {
-            if (isInsideEC2() && jenkinsInstance != null) {
-                fs = new LibZFS().getFileSystemByMountPoint(jenkinsInstance.getRootDir());
-            }
-        } catch (LinkageError e) {
-            // probably not running on OpenSolaris
-        }
-        if (fs == null || zen == null) {
-            cancel();
-            return;
-        }
-        ZFSPool pool = fs.getPool();
-        long a = pool.getAvailableSize();
-        long t = pool.getSize();
-
-        // if the disk is 90% filled up and the available space is less than
-        // 1GB,
-        // notify the user
-        zen.activated = t / a > 10 && a < 1000L * 1000 * 1000;
-    }
-
-    /**
-     * Returns true if this JVM runs inside EC2.
-     */
-    public static synchronized boolean isInsideEC2() {
-        if (isInsideEC2 == null) {
-            try {
-                new URL("http://169.254.169.254/latest").openStream().close();
-                isInsideEC2 = true;
-            } catch (IOException e) {
-                isInsideEC2 = false;
-            }
-        }
-        return isInsideEC2;
-    }
-}
diff --git a/src/main/resources/hudson/plugins/ec2/ebs/Messages.properties b/src/main/resources/hudson/plugins/ec2/ebs/Messages.properties
deleted file mode 100644
index 5ca743d62..000000000
--- a/src/main/resources/hudson/plugins/ec2/ebs/Messages.properties
+++ /dev/null
@@ -1 +0,0 @@
-ZPoolExpandNotice.DisplayName=ZFS Pool Monitor
diff --git a/src/main/resources/hudson/plugins/ec2/ebs/ZPoolExpandNotice/index.jelly b/src/main/resources/hudson/plugins/ec2/ebs/ZPoolExpandNotice/index.jelly
deleted file mode 100644
index 08f2db56b..000000000
--- a/src/main/resources/hudson/plugins/ec2/ebs/ZPoolExpandNotice/index.jelly
+++ /dev/null
@@ -1,40 +0,0 @@
-<!--
-The MIT License
-
-Copyright (c) 2004-2009, Sun Microsystems, Inc., Kohsuke Kawaguchi
-
-Permission is hereby granted, free of charge, to any person obtaining a copy
-of this software and associated documentation files (the "Software"), to deal
-in the Software without restriction, including without limitation the rights
-to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-copies of the Software, and to permit persons to whom the Software is
-furnished to do so, subject to the following conditions:
-
-The above copyright notice and this permission notice shall be included in
-all copies or substantial portions of the Software.
-
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
-THE SOFTWARE.
--->
-<?jelly escape-by-default='true'?>
-<j:jelly xmlns:j="jelly:core" xmlns:st="jelly:stapler" xmlns:d="jelly:define" xmlns:l="/lib/layout" xmlns:t="/lib/hudson" xmlns:f="/lib/form" xmlns:i="jelly:fmt">
-	<l:layout title="HUDSON_HOME is almost full">
-		<l:main-panel>
-      <h1>JENKINS_HOME is almost full</h1>
-
-      <p>
-        Your <tt>JENKINS_HOME</tt> (${app.rootDir}) is almost full.
-        When this directory completely fills up, it will cause problems
-        because Jenkins can't store any more data.
-      </p><p>
-        
-      </p>
-
-    </l:main-panel>
-	</l:layout>
-</j:jelly>
\ No newline at end of file
diff --git a/src/main/resources/hudson/plugins/ec2/ebs/ZPoolExpandNotice/message.jelly b/src/main/resources/hudson/plugins/ec2/ebs/ZPoolExpandNotice/message.jelly
deleted file mode 100644
index 78ef3cc04..000000000
--- a/src/main/resources/hudson/plugins/ec2/ebs/ZPoolExpandNotice/message.jelly
+++ /dev/null
@@ -1,33 +0,0 @@
-<!--
-The MIT License
-
-Copyright (c) 2004-2009, Sun Microsystems, Inc., Kohsuke Kawaguchi
-
-Permission is hereby granted, free of charge, to any person obtaining a copy
-of this software and associated documentation files (the "Software"), to deal
-in the Software without restriction, including without limitation the rights
-to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-copies of the Software, and to permit persons to whom the Software is
-furnished to do so, subject to the following conditions:
-
-The above copyright notice and this permission notice shall be included in
-all copies or substantial portions of the Software.
-
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
-THE SOFTWARE.
--->
-<?jelly escape-by-default='true'?>
-<j:jelly xmlns:j="jelly:core" xmlns:st="jelly:stapler" xmlns:d="jelly:define" xmlns:l="/lib/layout" xmlns:t="/lib/hudson" xmlns:f="/lib/form">
-  <div class="warning">
-    <form method="post" action="${rootURL}/administrativeMonitor/zpool.ebs/">
-      Your data directory in Jenkins (${app.rootDir} - AKA <tt>HUDSON_HOME</tt>) is getting close to full.
-      You should act on it before it's completely full.
-      <f:submit value="${%Tell me more}"/>
-    </form>
-  </div>
-</j:jelly>
\ No newline at end of file