Home > Storage > PowerMax and VMAX > Storage Admin > Dell PowerMax and VMAX: Non-Disruptive and Minimally Disruptive Migration Best Practices and Operational Guide > NDM Update guide plan and environment overview
With the inclusion of NDM update for HYPERMAXOS and PowerMaxOS (released in Q3 of 2019) and Solutions Enabler 9.1, parameters available during the create step include the following:
The offline parameter must be used in order to differentiate between NDM and a migration requiring minimal downtime (NDM Update). However, the move identity (NDM Update only) and precopy parameter are optional and can be used together or as individual parameters in addition to offline. Depending on the particular environment and user needs, the offline can be used with both precopy and move identity, or with either one.
The walkthrough guide in this section describes two methods for NDM Update using the following:
The duration of this walkthrough uses the PowerMax arrays in the graphic below.
NDM Update migrates SGs from 000197900111 to 000197600156.
Prior to the start of a planned migration, ensure that the prerequisite checks for using NDM Update have been completed:
Even though the walkthrough guide provides a detailed device examination after each step, and inspects the workings of each of the issued commands, the user needs to issue three commands to migrate an SG from source to target:
Note: If migrating Solaris Cluster environments using NDM Update, review Appendix G: NDM Update with Solaris cluster.