A storage administrator is creating a disaster recovery solution for HPE Alletra 9000 storage arrays. Currently, the company has three storage arrays at three different primary sites. When implementing the N- to-1 Remote Copy (RC) feature, what is the minimum number of storage arrays the storage administrator needs to plan for at the disaster recovery site?

HPE Alletra 9000 storage arrays support flexible disaster recovery topologies using Remote Copy (RC) software, including N-to-1 replication configurations. In an N-to-1 Remote Copy architecture, multiple independent primary storage arrays (up to N source arrays located at distinct geographically dispersed sites) replicate their transactional volume data to a single consolidated target storage array situated at the central disaster recovery site. Because the target array can accept multiple independent incoming replication streams from all three primary systems simultaneously, the storage administrator only needs to plan for a minimum of one storage array at the central disaster recovery site.

B. Two arrays exceed the minimum requirement because a single central target array can aggregate replication streams from all primary sites.
C. Four arrays are unnecessary; N-to-1 topology consolidates multiple source arrays onto a single destination system at the DR location.
D. Six arrays far exceed requirements for a 3-to-1 replication model, adding unnecessary infrastructure complexity and cost.

- HPE Alletra 9000 Remote Copy Administrator Guide

Section: Remote Copy Topologies - N-to-1 Replication.

- HPE Storage Architecture Guide: HPE Alletra 9000 Data Protection and Disaster Recovery.