Chapter 5. vSphere Pluggable Storage Architecture
vSphere 6 continues to utilize the Pluggable Storage Architecture (PSA), which was introduced with ESX 3.5. This architecture modularizes the storage stack, which makes it easier to maintain and enables storage partners to develop their own proprietary components that plug into this architecture.
Availability is critical, and redundant paths to storage are essential. One of the key functions of the storage component in vSphere is to provide multipathing (that is, which path a given I/O should use if there are multiple paths) and failover (that is, I/O switching to using another path when a path goes down).
VMware, by default, provides a generic multipathing plug-in (MPP) called the Native Multipathing ...
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