Advantages of multipath HA

Multipath connections in an HA pair reduce single-points-of-failure.

By providing two paths from each controller to every disk shelf, multipath HA provides the following advantages:

• The loss of a disk shelf module, connection, or host bus adapter (HBA) does not require a failover.

  The same storage system can continue to access the data using the redundant path.

• The loss of a single disk shelf module, connection, or HBA does not prevent a successful failover.

  The takeover node can access its partner’s disks using the redundant path.

• You can replace modules without having to initiate a failover.