diff --git a/plugins/dynamix/include/update.trim.php b/plugins/dynamix/include/update.trim.php
index 2d7235d32..b845e4fa4 100644
--- a/plugins/dynamix/include/update.trim.php
+++ b/plugins/dynamix/include/update.trim.php
@@ -19,9 +19,7 @@ if ($_POST['mode']>0) {
   $min  = isset($_POST['min'])  ? $_POST['min']  : '*';
   $dotm = isset($_POST['dotm']) ? $_POST['dotm'] : '*';
   $day  = isset($_POST['day'])  ? $_POST['day']  : '*';
-  $cron = "# Generated ssd trim schedule:\n$min $hour $dotm * $day /sbin/fstrim -a -v | logger &> /dev/null\n";
-  exec("/usr/sbin/zpool status|grep -Po 'pool: \K.+'",$zfs_pools);
-  foreach ($zfs_pools as $pool) if ($pool) $cron .= "$min $hour $dotm * $day /usr/sbin/zpool trim $pool 2> /dev/null\n";
+  $cron = "# Generated TRIM schedule:\n$min $hour $dotm * $day /usr/local/emhttp/plugins/dynamix/scripts/ssd_trim cron|logger &> /dev/null\n";
 } else {
   $cron = "";
 }
diff --git a/plugins/dynamix/scripts/ssd_trim b/plugins/dynamix/scripts/ssd_trim
index 500856823..82a4d55c4 100755
--- a/plugins/dynamix/scripts/ssd_trim
+++ b/plugins/dynamix/scripts/ssd_trim
@@ -17,11 +17,32 @@ $docroot = $docroot ?? $_SERVER['DOCUMENT_ROOT'] ?: '/usr/local/emhttp';
 require_once "$docroot/webGui/include/Wrappers.php";
 extract(parse_plugin_cfg('dynamix',true));
 
+// cron operation
+if ($argc==2 && $argv[1]=='cron') {
+  // trim btrfs
+  echo shell_exec("fstrim -va 2>/dev/null");
+  // trim zfs
+  exec("zpool status|grep -Po 'pool: \K.+'",$zfs_pools);
+  foreach ($zfs_pools as $pool) if ($pool) {
+    exec("zpool trim -w $pool 2>/dev/null");
+    echo zfs_info($pool)."\n";
+  }
+  exit(0);
+}
+
 // add translations
 $_SERVER['REQUEST_URI'] = 'settings';
 $login_locale = _var($display,'locale');
 require_once "$docroot/webGui/include/Translations.php";
 
+function zfs_info($pool) {
+  $trim = preg_replace('/(.$)/',' $1',exec("zfs list -Ho used $pool"))."iB";
+  $bytes = exec("zfs list -Hpo used $pool");
+  exec("zpool status -tP $pool|grep -Po '^\s+\K.+% trimmed'",$devs);
+  $devs = implode(', ',array_map(function($d){return strtok($d,' ');},$devs));
+  return "/mnt/$pool: $trim ($bytes bytes) trimmed on $devs";
+}
+
 function write(...$messages){
   $com = curl_init();
   curl_setopt_array($com,[
@@ -39,30 +60,20 @@ function write(...$messages){
 
 write(_("TRIM operation started").".\n","\n","\n");
 
-// trim btrfs pools
+// trim btrfs file system
 exec("findmnt -lnt btrfs|sort -rk2|awk '$1!~\"btrfs\"{print $1,$2}'",$mounts);
 foreach ($mounts as $mount) {
   [$target,$source] = explode(' ',$mount);
   write("$target: ... <i class='fa fa-spin fa-circle-o-notch'></i>\r");
-  write(exec("fstrim -v $target")." on $source\r","\n");
+  write(exec("fstrim -v $target 2>/dev/null")." on $source\r","\n");
 }
 
-// trim zfs pools
+// trim zfs file system
 exec("zpool status|grep -Po 'pool: \K.+'",$zfs_pools);
 foreach ($zfs_pools as $pool) if ($pool) {
-  unset($devs);
-  exec("zpool trim $pool");
-  while (true) {
-    sleep(1);
-    $trim = exec("zpool status -t $pool|grep -Pom1 '\d+% trimmed'");
-    write("/mnt/$pool: $trim\r");
-    if (substr($trim,0,3)==100) break;
-  }
-  $trim = preg_replace('/(.$)/',' $1',exec("zfs list $pool|grep -Pom1 '^$pool\s+\K\S+'"))."iB";
-  $bytes = exec("zfs list -p $pool|grep -Pom1 '^$pool\s+\K\d+'");
-  exec("zpool status -t $pool|grep -Po '^\s+\K.+100%'",$devs);
-  $devs = implode(', ',array_map(function($dev){return "/dev/".strtok($dev,' ');},$devs));
-  write("/mnt/$pool: $trim ($bytes bytes) trimmed on $devs\r","\n");
+  write("/mnt/$pool: ... <i class='fa fa-spin fa-circle-o-notch'></i>\r");
+  exec("zpool trim -w $pool 2>/dev/null");
+  write(zfs_info($pool)."\r","\n");
 }
 write(_("Finished")."\n",'_DONE_','');
 ?>