Home > Storage > PowerMax and VMAX > Data Protection > Dell PowerMax and VMAX All Flash: SRDF/Metro Overview and Best Practices > AIX native multipathing software
Best practice is to mask the R2 devices to host operating system once the SRDF/Metro reaches Active-Active or Active-Bias state. If the R2 device paths were masked and discovered before starting SRDF/Metro then some path cleanup and rescan would be required.
For Native Multipathing software on AIX operating systems, the best practice is to use the following setting for MPIO:
algorithm = round_robin (you can choose other algorithm too)
check_cmd = inquiry
queue_depth = 32
reserve_policy = PR_shared