2V0-620 · Question #113
A company has decided to implement Virtual SAN within their vSphere 6.x environment. The Virtual SAN cluster will be composed of three ESXi 6.x hosts that are on the Virtual SAN Ready Node list. Each
The correct answer is A. 4 disk groups with 1 SSD and 5 MDs each B. 2 disk groups with 1 SSD and 7 MDs each. VMware VSAN disk groups require exactly 1 SSD as the cache tier per group and support a maximum of 7 capacity disks per group. Options A and B satisfy both constraints, while C and D violate them.
Question
A company has decided to implement Virtual SAN within their vSphere 6.x environment. The Virtual SAN cluster will be composed of three ESXi 6.x hosts that are on the Virtual SAN Ready Node list. Each ESXi host includes:
- Two SAS Controllers that support Passthrough Mode
- Four Solid State Drives (SSDs) 1TB in size each
- 20 SAS Magnetic Disks (MDs) 1TB in size each
- The SSDs and MDs are evenly split between the two SAS controllers
The company will pilot a Virtual SAN cluster utilizing VMware best practices while maximizing storage capacity. The Virtual SAN cluster will use Manual Mode. Which two Disk Group configurations would meet the stated configuration requirements? (Choose two.)
Options
- A4 disk groups with 1 SSD and 5 MDs each
- B2 disk groups with 1 SSD and 7 MDs each
- C2 disk groups with 2 SSDs and 7 MDs each
- D2 disk groups with 1 SSD and 10 MDs each
How the community answered
(28 responses)- A64% (18)
- C11% (3)
- D25% (7)
Why each option
VMware VSAN disk groups require exactly 1 SSD as the cache tier per group and support a maximum of 7 capacity disks per group. Options A and B satisfy both constraints, while C and D violate them.
Creating 4 disk groups each with 1 SSD and 5 MDs uses all 4 SSDs and all 20 MDs per host, maximizing total storage capacity while staying within the 7-MD-per-disk-group limit and following the best practice of 1 SSD per disk group as the cache tier.
Two disk groups each with 1 SSD and 7 MDs is valid because it uses exactly 1 SSD as cache per disk group and exactly 7 capacity MDs, which is the maximum allowed per disk group under VMware VSAN best practices, making it a technically compliant configuration.
Each VSAN disk group supports only one SSD as the cache tier; placing 2 SSDs in a single disk group is not a supported configuration.
VMware VSAN limits capacity disks to a maximum of 7 per disk group; 10 MDs per disk group exceeds this hard limit and is therefore invalid.
Concept tested: Virtual SAN disk group capacity and cache tier limits
Source: https://docs.vmware.com/en/VMware-vSphere/6.7/com.vmware.vsphere.virtualsan.doc/GUID-008D32C7-332B-4799-B4FE-9903F0B1B4DA.html
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