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Question 120 - 5V0-22.21 discussion

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An all-flash vSAN cluster contains four nodes.

Which two storage policies can the cluster satisfy? (Choose two.)

A.
FTT=2 (RAID-1 Mirroring)
Answers
A.
FTT=2 (RAID-1 Mirroring)
B.
FTT=2 (RAID-6 Erasure Coding)
Answers
B.
FTT=2 (RAID-6 Erasure Coding)
C.
FTT=1 (RAID-1 Mirroring)
Answers
C.
FTT=1 (RAID-1 Mirroring)
D.
FTT=1 (RAID-5 Erasure Coding)
Answers
D.
FTT=1 (RAID-5 Erasure Coding)
E.
FTT=3 (RAID-1 Mirroring)
Answers
E.
FTT=3 (RAID-1 Mirroring)
Suggested answer: C, D

Explanation:

An all-flash vSAN cluster contains a sufficient number of capacity devices and cache devices to support different RAID levels.

FTT=3(RAID-1 Mirroring) - This policy requires at least 4 capacity devices, where each object is mirrored across three copies of the object. This can be satisfied by the 4 nodes all-flash vSAN cluster.

FTT=1 (RAID-1 Mirroring) - This policy requires at least 2 capacity devices, where each object is mirrored across one copy of the object. This can be satisfied by the 4 nodes all-flash vSAN cluster.

FTT=2 (RAID-6 Erasure Coding) - This policy requires at least 6 capacity devices, where each object is striped across two sets of parity and data. This cannot be satisfied by the 4 nodes all-flash vSAN cluster.

FTT=1 (RAID-5 Erasure Coding) - vSAN does not support RAID-5 Erasure coding.

Reference: https://docs.vmware.com/en/VMwarevSphere/

7.0/com.vmware.vsphere.vsan.doc/GUID-2E99D1D1-1D9E-4C9A-9F17-0E1A7C846F5D.html

asked 16/09/2024
Salman Hashmi
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