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2V0-622 · 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 uses different default Path Selection Policies depending on whether the storage array uses ALUA or standard active-active configurations.

Section 3 – Configure and Administer vSphere 6.5 Storage

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

(32 responses)
  • A
    3% (1)
  • B
    94% (30)
  • D
    3% (1)

Why each option

VMware ESXi uses different default Path Selection Policies depending on whether the storage array uses ALUA or standard active-active configurations.

AThe default Path Selection Policy is VMW_PSP_MRU for iSCSI or FC devices.

VMW_PSP_MRU is not the default for generic iSCSI or FC devices - it is reserved for Active/Passive and ALUA-capable arrays, not standard active-active configurations.

BThe default Path Selection Policy is VMW_PSP_FIXED for iSCSI or FC devices.Correct

VMW_PSP_FIXED is the default Path Selection Policy for iSCSI and FC devices connected to standard active-active storage arrays, meaning ESXi always uses a preferred path and only fails over when that path fails.

CVMW_PSP_MRU is typically selected for ALUA arrays by default.Correct

ALUA (Asymmetric Logical Unit Access) arrays expose optimized and non-optimized paths, and VMW_PSP_MRU (Most Recently Used) is selected by default for ALUA arrays because it respects path state changes reported by the array without constantly switching between paths.

DVMW_PSP_FIXED is typically selected for ALUA arrays by default.

VMW_PSP_FIXED is not selected for ALUA arrays by default because ALUA arrays require a policy that responds to optimized vs. non-optimized path state, which MRU handles and FIXED does not.

Concept tested: VMware ESXi default Path Selection Policies

Source: https://docs.vmware.com/en/VMware-vSphere/7.0/com.vmware.vsphere.storage.doc/GUID-DB5BC795-B892-4395-8A18-7A7E7228A3FC.html

Topics

#PSP#VMW_PSP_FIXED#ALUA#multipathing defaults

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