diff --git a/plugins/dynamix/DeviceInfo.page b/plugins/dynamix/DeviceInfo.page
index 14d7c17c6..7d7edfd20 100644
--- a/plugins/dynamix/DeviceInfo.page
+++ b/plugins/dynamix/DeviceInfo.page
@@ -430,6 +430,7 @@ _(File system type)_:
 
 <?endif;?>
 <?if (in_array($name,$pools)):?>
+<?$disabled = $var['fsState']!="Stopped" ? "disabled" : ""?>
 _(Minimum free space)_:
 : <input type="text" name="diskFloor.<?=$disk['idx']?>" maxlength="16" value="<?=$disk['diskFloor']?>" class="narrow" <?=$disabled?> placeholder="0">