ESXi 6.0 EP4 – CBT Fix

I thought that I would just post this up to let anyone know that the Express Patch to help fix the ESXi 6.0 CBT issue has now been released and is available under the following KB numbers:

2137546  &  213&545

Summary of the fix is enclosed below:


Summaries and Symptoms

This patch updates the esx-base VIB to resolve an issue that occurs when you run virtual machine backups which utilize Changed Block Tracking (CBT) in ESXi 6.0, the CBT API call QueryDiskChangedAreas() might return incorrect changed sectors that results in inconsistent incremental virtual machine backups. The issue occurs as the CBT fails to track changed blocks on the VMs having I/O during snapshot consolidation.

Patch Download and Installation

The typical way to apply patches to ESXi hosts is through the VMware vSphere Update Manager.
Please note that this has not been tested by me and the information provided is correct at the time of publish.

About the Author


I'm a technical person who has held many IT related jobs for the past 20+ years. I am now working for VMware helping customers to maximise their investment in VMware technologies.

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