Home > Storage > PowerMax and VMAX > Storage Admin > Dell PowerMax and VMAX: Non-Disruptive and Minimally Disruptive Migration Best Practices and Operational Guide > Consolidate a single application on two arrays into a single target
Storage arrays are more compact, have more power, and more storage as time progresses. So NDM is being used to consolidate a number of older arrays onto a single array. For various reasons, we see Storage groups spread across multiple arrays in data centers. Once the groups are moved, using NDM, to a single array they can be merged, as long as the IGs and PGs contain the same elements.
The example above shows two storage groups (ApplicationSG1 and ApplicationSG2) that have been migrated from two separate arrays. The groups use the same application host and so their IGs are identical. The target PG was selected manually by the storage administrator.
To merge the groups using Unisphere, select one of them on the Storage Groups dashboard. Click the more options (three dots) icon and select SG Maintenance > Merge Into.
In the pop-up box, select the storage group you want to merge the selected group into, and click Run Now. Only storage groups with the correct masking elements are available in this dialog.
The result is a single storage group, ApplicationSG2, that retains the original masking view.
With Solutions Enabler, use the symsg library:
symsg –sg <SgName> -sid <SymmID> merge <SgName1>
split <SgName1> -view_name <MvName>
For the merge operation, the -sg <SgName> option is used to specify the source SG, for example, ApplicationSG1 for the merge operation. Specifying the name of the Storage Group to be merged (EnhancementChild1_Split)
The result is a single SG called ApplicationSG1 that contains the devices from both SGs.