2V0-621 · Question #65
Which two statements are true regarding Storage Multipathing Plug-Ins? (Choose two.)
The correct answer is B. The default Path Selection Policy is VMW_PSP_FIXED for iSCSI or FC devices. C. VMW_PSP_MRU is typically selected for ALUA arrays by default. VMware ESXi assigns Path Selection Policies based on array type, with VMW_PSP_FIXED as the default for standard iSCSI and FC arrays, while ALUA arrays receive VMW_PSP_MRU to handle optimized vs non-optimized paths.
Question
Which two statements are true regarding Storage Multipathing Plug-Ins? (Choose two.)
Options
- AThe default Path Selection Policy is VMW_PSP_MRU for iSCSI or FC devices.
- BThe default Path Selection Policy is VMW_PSP_FIXED for iSCSI or FC devices.
- CVMW_PSP_MRU is typically selected for ALUA arrays by default.
- DVMW_PSP_FIXED is typically selected for ALUA arrays by default.
How the community answered
(51 responses)- A8% (4)
- B88% (45)
- D4% (2)
Why each option
VMware ESXi assigns Path Selection Policies based on array type, with VMW_PSP_FIXED as the default for standard iSCSI and FC arrays, while ALUA arrays receive VMW_PSP_MRU to handle optimized vs non-optimized paths.
VMW_PSP_MRU is not the default for iSCSI or FC devices - VMW_PSP_FIXED is the default for those device types, as MRU is reserved for active-passive and ALUA arrays.
VMW_PSP_FIXED is the default Path Selection Policy for iSCSI and Fibre Channel devices on standard active-active arrays; ESXi automatically assigns FIXED unless the array is detected as active-passive or ALUA-capable.
ALUA arrays expose both optimized and non-optimized paths, so ESXi assigns VMW_PSP_MRU by default to prefer the most recently used optimized path and avoid unnecessary path failover.
VMW_PSP_FIXED is not assigned to ALUA arrays by default - VMW_PSP_MRU is used instead, because FIXED does not account for the optimized vs non-optimized path distinction that ALUA requires.
Concept tested: VMware PSP defaults for iSCSI, FC, and ALUA arrays
Source: https://docs.vmware.com/en/VMware-vSphere/7.0/com.vmware.vsphere.storage.doc/GUID-DB5BC795-0A55-4573-8E97-B1BC91785D43.html
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