2V0-622D · Question #64
Which is the block size on the VMFS6 datastore?
The correct answer is D. Small file blocks are 1MB, large file blocks are 512MB.. VMFS6 uses a 1MB block size for standard small files and a 512MB block size for large files, enabling efficient storage of modern large-capacity VMDKs.
Question
Which is the block size on the VMFS6 datastore?
Options
- AAll small and large file blocks are 8MB.
- BAll small and large file blocks are 1MB.
- CSmall file blocks are 512KB. large file blocks are 64MB.
- DSmall file blocks are 1MB, large file blocks are 512MB.
How the community answered
(34 responses)- B3% (1)
- C3% (1)
- D94% (32)
Why each option
VMFS6 uses a 1MB block size for standard small files and a 512MB block size for large files, enabling efficient storage of modern large-capacity VMDKs.
8MB is not the block size for VMFS6 or any other supported VMFS version; no VMFS release standardized on an 8MB block size.
While 1MB is correct for small files, stating all blocks are 1MB is incorrect because VMFS6 specifically introduced the larger 512MB block to handle large files - a distinction absent from earlier VMFS versions.
512KB is not a VMFS6 block size for small files, and 64MB is not the large block size for VMFS6; these values correspond to no documented VMFS6 specification.
VMFS6 introduces a two-tier block allocation model: small file blocks remain at 1MB (consistent with VMFS5) while large file blocks use 512MB units, reducing per-block metadata overhead and improving scalability for very large virtual disk files that are common in modern deployments.
Concept tested: VMFS6 small and large file block size allocation
Source: https://docs.vmware.com/en/VMware-vSphere/7.0/com.vmware.vsphere.storage.doc/GUID-7552DAD4-1809-4687-8F7B-A7F35E78F0E0.html
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