VCP-VVF Practice Question: An administrator is troubleshooting a virtual machine that cannot be powered on
An administrator is troubleshooting a virtual machine that cannot be powered on. The error message states: 'Failed to lock the file'. What does this error typically signify in vSphere?
⚠ Common exam trap
VCP-VVF often tests the misconception that file lock errors are caused by storage capacity or licensing issues, when in reality they are almost always due to concurrent access from another host or a stuck process.
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
✓
Another ESXi host, a running process, or a stuck task currently holds an exclusive lock on the VM's configuration or disk files.
The 'Failed to lock the file' error in vSphere occurs when the ESXi host cannot obtain an exclusive lock on the VM's configuration file (.vmx) or virtual disk files (.vmdk). This lock is held by another ESXi host (in a shared-storage cluster), a running VM process, or a stuck/orphaned task. The lock mechanism prevents multiple hosts from simultaneously writing to the same VM files, which would cause corruption.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Another ESXi host, a running process, or a stuck task currently holds an exclusive lock on the VM's configuration or disk files.
Why this is correct
The lock error arises because vSphere grants exclusive access to a VM's configuration and disk files; a second ESXi host, orphaned process, or stuck task still holding that lock blocks the power-on, matching the stem's symptom precisely.
- ✗
The VM's virtual disk has reached its maximum size limit of 62TB.
Why it's wrong here
'Failed to lock the file' indicates the .vmx or .vmdk is already locked by another host or process, not that a disk hit the 62TB limit. It is tempting because maximum virtual disk size is a real vSphere constraint, and reaching it would prevent power-on, but that failure reports a different configuration error.
- ✗
The virtual machine license has expired, causing the hypervisor to lock the VM files.
Why it's wrong here
Licensing expiry does not lock VM files; the error arises when the .vmx or .vmdk lock is held by another host or stale process. It is tempting because licence problems do block VM operations, making licence checks a reasonable troubleshooting step, but they produce explicit licensing messages rather than file-lock failures.
- ✗
The guest operating system has activated its internal disk encryption lock.
Why it's wrong here
Guest-level disk encryption is transparent to ESXi and cannot cause a host file-lock error, which concerns the .vmx or .vmdk lock held by another host or process. It is tempting because encryption does prevent disk access, but it operates inside the guest, not at the VMFS locking layer.
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Written and reviewed by Johnson Ajibi, MSc IT Security
Security Systems Architect · founder of Courseiva
Last reviewed September 2026 · checked against the official VMware exam blueprint
This VCP-VVF 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-VVF exam.