Home > Storage > PowerMax and VMAX > Storage Admin > Dell PowerMax: Data Mobility Best Practices and Operational Guide > Appendix C: Consistent LUN
By default, VMAX and PowerMax arrays are delivered with the ACLX using LUN 0 and visible on a number of ports. Therefore, if the SHOW_ACLX_DEV attribute is still in effect on a port that NDM will choose and the source array is using Consistent LUN and is also using LUN 0, then we will not be able to set the same LUN addresses. This is because LUN 0 is not available on the target array for all the ports that NDM will use when it builds the Masking View.
When the target PowerMax array is deployed and storage is already provisioned to the host using LUN addresses that match those of ‘application to be migrated’ that resides on the source array, since the addresses are already in use when the devices are migrated new addresses that are consistent across paths will be applied but they will not be the same as the source. This not a problem as devices are identified by operating systems and filesystems by the device WWN not the device address.