Question: 120 I Which VMware troubleshooting feature allows admins to replay a host crash for root cause analysis?

When a VMware ESXi host experiences a critical kernel error, it halts and displays a purple diagnostic screen (PSOD). At this time, it generates a core dump, which is a file containing the state of the host's memory at the moment of the crash. Analyzing this ESXi core dump file allows administrators and VMware support to perform a post-mortem investigation. This analysis effectively reconstructs the sequence of events and system state leading to the failure, which is analogous to "replaying" the crash for root cause analysis.

B. BIOS logs record hardware-level events (e.g., memory errors, power faults) but do not capture the software or kernel state required to analyze a host OS crash.
C. GPU utilization dashboards are performance monitoring tools used to observe real-time or historical GPU metrics, not for post-mortem analysis of a host kernel failure.
D. Windows Event Viewer is a logging tool specific to the Microsoft Windows operating system and is not used for troubleshooting a VMware ESXi hypervisor crash.

1. VMware vSphere Documentation. (vSphere 8.0 > vSphere Troubleshooting > ESXi Host Management > ESXi Host Failures). The documentation states, "When the VMkernel experiences a critical error... it displays a purple diagnostic screen... To help identify the cause of the error, a core dump (memory dump) can be configured to be saved to a file." This confirms the core dump's role in root cause analysis of a host crash.

2. VMware Knowledge Base Article 2003004. ("Interpreting an ESX/ESXi host purple diagnostic screen"). This article explains that the purple screen contains information about the crash, but "A full analysis of the crash can only be done by analyzing the vmkernel-zdump (core dump)." This highlights the core dump as the primary tool for in-depth analysis.

3. HPE ProLiant Gen10 Plus Servers and HPE ProLiant Gen11 Servers VMware vSphere 7.0 U3 Troubleshooting Guide. (Page 10, "Server is unresponsive"). In the troubleshooting steps for an unresponsive server, the guide explicitly instructs: "If the server has a purple screen, collect the ESXi core dump." This shows its critical role in the troubleshooting process on HPE hardware.