2V0-621 · Question #64
Which two tasks does the Pluggable Storage Architecture (PSA) perform? (Choose two.)
The correct answer is A. Handles I/O queueing to the logical devices. C. Handles physical path discovery and removal. The Pluggable Storage Architecture (PSA) is responsible for managing I/O queueing to logical storage devices and handling the full lifecycle of physical path discovery and removal.
Question
Which two tasks does the Pluggable Storage Architecture (PSA) perform? (Choose two.)
Options
- AHandles I/O queueing to the logical devices.
- BHandles physical path discovery, but is not involved in the removal.
- CHandles physical path discovery and removal.
- DHandles I/O queueing to FC storage HBAs.
How the community answered
(47 responses)- A89% (42)
- B4% (2)
- D6% (3)
Why each option
The Pluggable Storage Architecture (PSA) is responsible for managing I/O queueing to logical storage devices and handling the full lifecycle of physical path discovery and removal.
The PSA manages I/O queueing to logical devices (LUNs/datastores) by coordinating between the Native Multipathing Plugin (NMP) and the underlying path selection and storage array type plug-ins.
This statement is incorrect because the PSA handles both path discovery AND removal - it is not limited to discovery only.
The PSA is responsible for both discovering new physical paths as they become available and removing paths that are no longer valid, giving it full lifecycle management of physical storage paths.
The PSA handles I/O queueing to logical storage devices (LUNs), not directly to Fibre Channel HBAs; HBA-level communication is handled by lower-level drivers outside the PSA framework.
Concept tested: Pluggable Storage Architecture PSA responsibilities
Source: https://docs.vmware.com/en/VMware-vSphere/7.0/com.vmware.vsphere.storage.doc/GUID-52B1C0A5-72FB-4E4A-A8BB-E6BDDB0D37E1.html
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