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2V0-620 · Question #88

Which two actions are required when enabling vFlash Read Cache for a virtual machine's virtual disk? (Choose two.)

The correct answer is A. A value in the Virtual Flash Read Cache text box must be entered. D. The Enable virtual flash host swap cache check box must be selected. Enabling vFlash Read Cache for a virtual disk requires both specifying a cache reservation size for that disk and enabling the vFlash feature at the host level via the host swap cache checkbox.

Section 4 – Deploy and Administer VMware Virtual Machines

Question

Which two actions are required when enabling vFlash Read Cache for a virtual machine's virtual disk? (Choose two.)

Options

  • AA value in the Virtual Flash Read Cache text box must be entered.
  • BA Flash Resource Pool for Cache size reservation must be entered.
  • CThe Device backing and the block size must be configured.
  • DThe Enable virtual flash host swap cache check box must be selected.

How the community answered

(23 responses)
  • A
    70% (16)
  • B
    9% (2)
  • C
    22% (5)

Why each option

Enabling vFlash Read Cache for a virtual disk requires both specifying a cache reservation size for that disk and enabling the vFlash feature at the host level via the host swap cache checkbox.

AA value in the Virtual Flash Read Cache text box must be entered.Correct

A numeric value must be entered in the Virtual Flash Read Cache text box to reserve flash capacity for that specific virtual disk - without this reservation the feature remains inactive for the disk.

BA Flash Resource Pool for Cache size reservation must be entered.

There is no separate 'Flash Resource Pool for Cache size reservation' step in the vFlash Read Cache configuration workflow - the reservation is entered directly on the virtual disk settings dialog.

CThe Device backing and the block size must be configured.

Device backing and block size are configuration parameters for RDM or advanced disk configurations, not required fields when enabling vFlash Read Cache on a standard virtual disk.

DThe Enable virtual flash host swap cache check box must be selected.Correct

The 'Enable virtual flash host swap cache' checkbox activates the vFlash infrastructure on the host, which is a prerequisite before any per-VM vFlash Read Cache reservation can take effect.

Concept tested: Enabling vFlash Read Cache on a virtual machine disk

Source: https://docs.vmware.com/en/VMware-vSphere/6.0/com.vmware.vsphere.storage.doc/GUID-4C6AEA8B-1D0C-4D5F-B4CF-BCEEDF68F8F0.html

Topics

#vFlash Read Cache#virtual disk#vFRC configuration#host swap cache

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