Home > Storage > PowerMax and VMAX > Data Protection > Dell PowerMax and VMAX All Flash: SRDF/Metro Overview and Best Practices > Native Linux Multipathing Software (Linux Device Mapper)
After SRDF/Metro reaches active state:
If SRDF/Metro was started without unmasking the R2 devices, run multipathing commands or scripts to remove the stale paths.
Use the default /etc/multipath.conf file. The following options are best practices to help the operating system and multipathing software to detect path changes efficiently:
Path_grouping_policy multibus
path_checker tur
features "1 queue_if_no_path"
path_selector "round-robin 0"
no_path_retry 10