In VMware Cloud Foundation (VCF) 5.2, thephysical designspecifies tangible hardware and infrastructure choices, while logical design includes policies and configurations. The question focuses on vSAN Original Storage Architecture (OSA) in a VCF environment. Let’s classify each decision:
Option A: DD01 - A storage policy that supports failure of a single fault domain being the server rack
This is a logical design decision. Storage policies (e.g., vSAN FTT=1 with rack awareness) define data placement and fault tolerance, configured in software, not hardware. It’s not part of the physical design.
Option B: DD02 - Each host will have two vSAN OSA disk groups, each with four 4TB Samsung SSD capacity drives
This is correct. This specifies physical hardware—two disk groups per host with four 4TB SSDs each (capacity tier). In vSAN OSA, capacity drives are physical components, making this a physical design decision for VCF hosts.
Option C: DD03 - Each host will have two vSAN OSA disk groups, each with a single 300GB Intel NVMe cache drive
This is correct. This details the cache tier—two disk groups per host with one 300GB NVMe drive each. Cache drives are physical hardware in vSAN OSA, directly part of the physical design for performance and capacity sizing.
Option D: DD04 - Disk drives capable of encryption at rest
This is a hardware capability but not strictly a physical design decision in isolation. Encryption at rest (e.g., SEDs) is enabled via vSAN configuration and policy, blending physical (drive type) and logical(encryption enablement) aspects. In VCF, it’s typically a requirement or constraint, not a standalone physical choice, making it less definitive here.
Option E: DD05 - Dual 10Gb or higher storage network adapters
This is a physical design decision (network adapters are hardware), but in VCF 5.2, storage traffic (vSAN) typically uses the same NICs as other traffic (e.g., management, vMotion) on a converged network. While valid, DD02 and DD03 are more specific to the storage subsystem’s physical layout, taking precedence in this context.
Conclusion:The two design decisions for the physical design areDD02 (B)andDD03 (C). They specify the vSAN OSA disk group configuration—capacity and cache drives—directly shaping the physical infrastructure of the VCF hosts.
References:
VMware Cloud Foundation 5.2 Architecture and Deployment Guide (Section: vSAN OSA Design)
VMware vSAN 7.0U3 Planning and Deployment Guide (integrated in VCF 5.2): Physical Design Considerations
VMware Cloud Foundation 5.2 Planning and Preparation Guide (Section: Storage Hardware)
