VCP-DCV Configure and Manage vSphere Storage Practice Question
An administrator needs to expand a VMFS5 datastore that is currently 2 TB in size. The underlying LUN is 5 TB. What is the maximum size the datastore can be expanded to without involving additional LUNs?
⚠ Common exam trap
VCP-DCV often tests the difference between the maximum supported VMFS datastore size (64 TB) and the actual expandable size, which is limited by the underlying LUN — candidates frequently pick 64 TB without checking the LUN size.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
5 TB
VMFS5 supports datastore sizes up to 64 TB, but the datastore cannot exceed the size of its underlying LUN. Since the LUN is 5 TB, the maximum the datastore can be expanded to without adding LUNs is 5 TB.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
64 TB
Why it's wrong here
VMFS5 caps a single extent at 2 TB minus 512 bytes, so a datastore cannot reach 64 TB without spanning additional extents or LUNs. The 64 TB figure applies to VMFS6, which supports large single extents; here the 5 TB LUN's capacity is irrelevant beyond the 2 TB extent limit.
- ✓
5 TB
Why this is correct
VMFS5 removed the 2 TB extent limit, so a single extent can span the full underlying LUN. Expanding the datastore to the LUN's full 5 TB capacity requires no additional extents, directly satisfying the constraint of avoiding extra LUNs.
- ✗
4 TB
Why it's wrong here
VMFS5's per-extent ceiling is 2 TB minus 512 bytes, so 4 TB is unreachable from one LUN without adding extents. The 4 TB value reflects neither the extent limit nor the 5 TB LUN; it would only arise from spanning two 2 TB extents, which the scenario forbids.
- ✗
2 TB
Why it's wrong here
The datastore already occupies 2 TB, so answering 2 TB describes its current size rather than any expansion. VMFS5 permits growth up to 2 TB minus 512 bytes per extent, so the correct figure sits just below 2 TB; 2 TB is the starting point, not the maximum.
About these practice questions
Courseiva writes every VCP-DCV question from scratch — 281 in total, each with an explanation and a wrong-answer breakdown. None are copied from real exams or dumps. Learn why practice questions differ from exam dumps →
JA
Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed September 2026 · checked against the official VMware exam blueprint
This VCP-DCV practice question is part of Courseiva's free VMware certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the VCP-DCV exam.