try to disable delete button on root disk

app/UI/Disk/Pages/DiskDataTable.php

@@ -135,7 +135,7 @@ class DiskDataTable extends DataTable implements ClientArea
                 "backup" => $entity->getBackup(),
                 "size"   => $entity->getSize(),
                 "bytes"  => $entity->getBytes(),
-                "master" => $rootDisk,
+                "master" => $entity->isMaster(),
             ];
         }
         $dataProv = new ArrayDataProvider();