CCNA Data Center DCICT 640-916 Official Cert Guide

Array-Based Virtualization

In the array-based approach, the virtualization layer resides inside a storage array controller, and multiple other storage devices from the same vendor or from a different vendor can be added behind it. That controller, called the primary storage array controller, is responsible for providing the mapping functionality. The primary storage array controller also provides replication, migration, and other storage management services across the storage devices that it is virtualizing. The communication between separate storage array controllers enables the disk resources of each system to be managed collectively, either through a distributed management scheme or through a hierarchal master/slave relationship. The communication ...