An administrator is tasked to optimize storage utilization in an existing VMware vSAN Original Storage Architecture (OSA) cluster. The cluster has the following configuration: - Eight-node cluster with 1 disk group per node. - Virtual machines (VMs) are configured with 1 failure - RAID-1 storage policy. - Storage utilization is at 70%. Which action can the administrator take to reduce the existing storage utilization with the minimum impact to the cluster?

A. Enable Deduplication and Compression on the cluster.

B. Change the storage policy to 3 failure - RAID-1.

C. Enable Compression only on the cluster.

Broadcom-VMware

2V0-16.25 · Question #16

An administrator is tasked to optimize storage utilization in an existing VMware vSAN Original Storage Architecture (OSA) cluster. The cluster has the following configuration: - Eight-node cluster…

The correct answer is D. Change the storage policy to 2 failure - RAID-6. Changing to 2 failure - RAID-6 (erasure coding) reduces the storage overhead from 2x (RAID-1, FTT=1) to 1.5x - a guaranteed 25% reduction in raw capacity consumption - while also increasing fault tolerance, and the 8-node cluster satisfies RAID-6's minimum 6-node requirement…

Section 3 – Manage VMware vSphere Foundation Storage

Question

An administrator is tasked to optimize storage utilization in an existing VMware vSAN Original Storage Architecture (OSA) cluster. The cluster has the following configuration:

Eight-node cluster with 1 disk group per node.
Virtual machines (VMs) are configured with 1 failure - RAID-1 storage

policy.

Storage utilization is at 70%.

Which action can the administrator take to reduce the existing storage utilization with the minimum impact to the cluster?

Options

AEnable Deduplication and Compression on the cluster.
BChange the storage policy to 3 failure - RAID-1.
CEnable Compression only on the cluster.
DChange the storage policy to 2 failure - RAID-6.

How the community answered

(61 responses)

A
8% (5)
B
18% (11)
C
5% (3)
D
69% (42)

Explanation

Changing to 2 failure - RAID-6 (erasure coding) reduces the storage overhead from 2x (RAID-1, FTT=1) to 1.5x - a guaranteed 25% reduction in raw capacity consumption - while also increasing fault tolerance, and the 8-node cluster satisfies RAID-6's minimum 6-node requirement; the policy change applies online with no disk group reformatting, making it the lowest-impact option. Option A (Deduplication and Compression on OSA) requires all-flash disk groups and a rolling disk group reformat, which is operationally disruptive and offers no guaranteed savings since dedup efficiency depends on workload data patterns. Option B (3 failure - RAID-1) would create 4 full copies of every object (4x overhead), drastically increasing storage utilization rather than reducing it. Option C (Compression only) is a distractor because in vSAN OSA, compression is tied to the dedup+compression bundle and shares the same operational impact as Option A, making it no better for "minimum impact."

Memory tip: Think "RAID-6 = Raid the 6 for savings" - RAID-6's erasure coding always beats RAID-1 mirroring on space efficiency (1.5x vs 2x), so whenever you see a question about reducing vSAN storage utilization without sacrificing fault tolerance, RAID-6 is the space-saver.

Topics

#vSAN RAID Policies#Storage Optimization#Storage Policy Management#Capacity Planning

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