QUESTION 1
The following are the configuration details of a 12-node all-flash VSAN cluster:
Which two methods can be used to increase the size of the cache tier in each host? (Choose two.)
A. Promote a capacity device to a cache device so that each disk group has two cache devices.
B. Add a new cache device to the host. Reconfigure the host to have two disk groups with one cache device and three
capacity devices per disk group.
C. Add asecond cache device to each disk group.
D. Replace the existing cache device in each disk group with a larger cache device.
Answer: C,D
Explanation:
As you create disk groups on each host and add cache and capacity devices, the size of the datastore increases
accordingto the amount of physical capacity added by those devices.
Typically, you delete devices or disk groups from vSAN when you are upgrading a device or replacing a failed device, or
when you must remove a cache device.

QUESTION 2
An administrator is designing a vSphere cluster with the VSAN default policy. The requirement is to maintain full
redundancy of data and virtual disks during any patching or maintenance of this cluster.
What is needed to meet the needs of this scenario?
A. A minimum of four hosts in the cluster
B. VMware Proactive HA
C. Multiple disk groups per host
D. Use of RAID-5/6 erasure coding
Answer: B
Explanation:
Patching a vCenter High Availability Environment
You can patch a vCenter Server Appliance which is in a vCenter High Availability cluster by using the
software-packages utility available in thevCenter Server Appliance shell.
References:https://docs.vmware.com/en/VMware-vSphere/6.5/vsphere-esxi-vcenter-server-651-availability-guide.pdf,
page 78

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QUESTION 3
Which two factors below determine how a VMDK object will be split on a vSAN cluster? (Choose two.)
A. Checksum parameter
B. Free capacity in the cache tier devices
C. Size of the VMDK object
D. Stripe width parameter
Answer: C,D

QUESTION 4
Given a limited maximum queue depth, what can an administrator do to potentially improve performance when
deploying vSAN iSCSI volumes?
A. Utilize multiple iSCSI targets.
B. Change the erasure coding to RAID-6
C. Adjust the maximum iSCSI queue depth values
D. Configure multiple VMkernel ports
Answer: C
Explanation:
Today if you are noticing that your device queues are constantly bumping up to their maximum limits, it would be
recommended to increase the Device/LUN depth and use SIOC to help mitigate any potential noisy neighbor problem.
References:https://blogs.vmware.com/vsphere/2012/07/troubleshooting-storage-performance-in-vsphere-part-5-storagequeues.
html

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QUESTION 5
Which are two functions of software checksums in a vSAN environment? (Choose two.)
A. Limit the number of IOPS that an object can consume
B. Perform disk scrubbing in the background
C. Limit the number of reads to the capacity tiered disks
D. Automatically detect and resolve silent disk errors
Answer: B,D
Explanation:
Software checksums which will perform the following checks:
References: https://www.vladan.fr/vmware-vsan-6-2/