fix msterDisk bug

app/UI/Disk/Providers/DiskProvider.php

@@ -78,7 +78,7 @@ class DiskProvider extends BaseDataProvider implements ClientArea
         //cach
         $hdd->setCache($this->configuration()->getAdditionalDiskCache());
         //ssd
-        $hdd->setSsd($this->configuration()->isAdditionalDiskSsd());
+        $hdd->setSsd($this->configuration()->isAdditionalDiskSsd() ? 1 : null);
         //replicate
         if ($this->configuration()->isAdditionalDiskReplicate())
         {