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2V0-621 · Question #151

Which two scenarios could cause Storage DRS to be disabled on a Virtual Disk (VMDK)? (Choose two.)

The correct answer is A. The VMDK is an independent disk. B. The virtual machine has vSphere Fault Tolerance enabled.. Storage DRS cannot manage VMDKs on independent disks or VMs with Fault Tolerance enabled because both configurations are incompatible with Storage vMotion, which Storage DRS relies on for disk relocation.

Section 3 – Configure and Administer vSphere 6.x Storage

Question

Which two scenarios could cause Storage DRS to be disabled on a Virtual Disk (VMDK)? (Choose two.)

Options

  • AThe VMDK is an independent disk.
  • BThe virtual machine has vSphere Fault Tolerance enabled.
  • CThe VMDK is hosted on NFS storage.
  • DThe virtual machine has a CD-ROM/ISO image connected.

How the community answered

(48 responses)
  • A
    81% (39)
  • C
    8% (4)
  • D
    10% (5)

Why each option

Storage DRS cannot manage VMDKs on independent disks or VMs with Fault Tolerance enabled because both configurations are incompatible with Storage vMotion, which Storage DRS relies on for disk relocation.

AThe VMDK is an independent disk.Correct

Independent disks are excluded from snapshots and cannot be relocated by Storage vMotion, so Storage DRS is automatically disabled for those VMDKs because SDRS depends entirely on Storage vMotion to rebalance disk placement across datastores.

BThe virtual machine has vSphere Fault Tolerance enabled.Correct

vSphere Fault Tolerance requires that the primary and secondary VM use tightly synchronized, identical storage, making Storage vMotion migrations incompatible with FT-enabled VMs, which causes Storage DRS to be disabled for all VMDKs on those virtual machines.

CThe VMDK is hosted on NFS storage.

NFS datastores are fully supported by Storage DRS for load balancing and initial placement recommendations - the NFS protocol alone does not cause Storage DRS to be disabled on a VMDK.

DThe virtual machine has a CD-ROM/ISO image connected.

A connected CD-ROM or ISO image does not disable Storage DRS on the VM's VMDKs; it may block snapshot creation in certain configurations but does not affect SDRS eligibility for data disks.

Concept tested: Storage DRS VMDK eligibility and exclusion scenarios

Source: https://docs.vmware.com/en/VMware-vSphere/7.0/com.vmware.vsphere.resmgmt.doc/GUID-6B32E9AA-B0D4-4C90-9A99-4FAF88A5B59F.html

Topics

#Storage DRS#independent disk#Fault Tolerance#VMDK exclusions

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