Home > Storage > PowerMax and VMAX > Storage Admin > Implementing Dell SRDF SRA with VMware SRM > Array Manager configuration
For SRDF/Star or standard 3-site SRDF environments including SRDF/Metro, the protected site array manager should always have the workload site Solutions Enabler server designated as the local Solutions Enabler. The remote Solutions Enabler server is a different situation.
Typically, 3-site topologies have three Solutions Enabler servers, one for each respective site. The Solutions Enabler server that is to be designated as the recovery site Solutions Enabler server can therefore either be the Solutions Enabler server located at site B or site C. The correct one to be configured in the array managers depends on if the user intends for the site B or site C to be the location of the DR site. Wherever the recovery VMware infrastructure resides dictates which Solutions Enabler server is to be used.
For Star and Non-Star alike, if there is a tertiary Solutions Enabler server it is not configured within SRM. The SRA does not require access to the third Solutions Enabler server, nor could it use it.
Note: It is not possible to configure both B and C sites in SRM. SRM is a two-site solution and can only support that, whether or not the underlying storage can support more.
When configuring array managers with 3-site MetroDR , the Solutions Enabler at the protection site should discover both the R1 and R2 SRDF/Metro pairs as local. This allows the SRA to be reconfigured to use the R2 in the event of an R1 failure. This is the case whether vMSC is configured in a uniform or nonuniform configuration. An example of this is seen in Figure 35, where the SRDF/Metro R1 ending in 1473 and the R2 ending in 1592 are seen as local, with connectivity to the remote R2 ending in 341.
The user can choose to enable both array pairs, or preferably enable just the R1. The R2 can be enabled at the point the R1 fails. If the user enables both, it can be confusing when creating the protection group since the correct array pair must be selected.
Figure 35. MetroDR SRDF/Metro array pairs