Setting up asynchronous mirroring between two NetApp E-Series systems requires specific licensing and management prerequisites. First, the Asynchronous Mirroring premium feature must be licensed and enabled on both the primary (local) and secondary (remote) storage arrays. This ensures both systems have the necessary software capabilities to participate in the replication relationship. Second, a centralized management application, either the legacy Enterprise Management Window (EMW) or the modern SANtricity Unified Manager, must be used. This is because creating a mirrored pair is an operation that spans two independent arrays, and a centralized tool is necessary to discover, manage, and configure the relationship between them.

A. The systems require IP connectivity for iSCSI-based mirroring, but they do not need to be on the same subnet. Standard IP routing between different subnets is sufficient.

D. The secondary volume must have a capacity equal to or greater than the primary volume, but there is no requirement for the entire secondary system to have double the capacity.

1. NetApp E-Series SANtricity 11.5 Remote Mirroring Express Guide

Page 6

"Prerequisites":

"The remote mirroring premium feature must be enabled on both the local and remote storage arrays." (Supports Answer B)

"Both storage arrays must be discovered in SANtricity Enterprise Management Window (EMW) or SANtricity Unified Manager." (Supports Answer C)

"The remote storage array must have a volume of equal or greater capacity than the primary volume to act as the secondary volume." (Refutes Answer D)

2. NetApp SANtricity System Manager 11.70 Online Help

Topic: "Create mirrored pair - prerequisites":

"The Asynchronous Mirroring premium feature is enabled on both the local storage array and the remote storage array." (Supports Answer B)

"Both storage arrays are discovered in SANtricity Unified Manager." (Supports Answer C)

"An iSCSI connection exists between the two storage arrays." (This section details configuring IP ports but does not mandate the same subnet

refuting Answer A).