QuestionQ90

Planning and Designing

A business unit needs proprietary data protected from a site failure while using the smallest possible amount of storage and fewest nodes. An administrator plans to deploy a vSAN OSA Stretched Cluster with dual-site protection and a local RAID-5 policy.

What is the minimum number of data nodes across all sites for this vSAN OSA Stretched Cluster configuration?

  • A 4
  • B 6
  • C 8
  • D 12
Explanation

Dual-site protection requires data placement at both data sites. In vSAN OSA, RAID-5 with FTT=1 requires a minimum of four hosts or fault domains for the local erasure-coded replica. Each of the two data sites therefore needs four data nodes, for a total of eight; the witness host does not store data replicas.

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