Which two tasks does the Pluggable Storage Architecture (PSA) perform? (Choose two.)
A.
Handles I/O queueing to the logical devices.
B.
Handles physical path discovery, but is not involved in the removal.
C.
Handles physical path discovery and removal.
D.
Handles I/O queueing to FC storage HBAs.
Pluggable Storage Architecture (PSA)
To manage storage multipathing, ESX/ESXi uses a special VMkernel layer, Pluggable Storage Architecture (PSA).
The PSA is an open modular framework that coordinates the simultaneous operation of multiple multipathing plugins (MPPs).
PSA is a collection of VMkernel APIs that allow third party hardware vendors to insert code directly into the ESX storage I/O path.
This allows 3rd party software developers to design their own load balancing techniques and failover mechanisms for particular storage array.
The PSA coordinates the operation of the NMP and any additional 3rd party MPP.
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