Learning VMware vSphere

Storage Array types

We have learnt from the previous section that there are different types of arrays not just based on the protocol they support but also the type of load balancing and failover they support.

• There are three types of arrays based on their load balancing or failover abilities:
  • Active/active array
  • Active/passive array
  • ALUA (Asymmetric Logical Unit Access) array
• The Active/Active or Symmetric Active/Active array will have all the ports on its storage controllers to allow simultaneous processing of the I/O offering the same levels of performance and access to all LUNs:

In a symmetric active/active array, there is no concept of a standby ...