Large number of ATS miscompare messages seen in the vmkernel log after upgrading to ESXi 6.5 U1

Products

• VMware vSphere ESXi

Issue/Introduction

Symptoms:

• After upgrading to ESXi 6.5 Update 1, you see large number of ATS miscompare messages.
• In /var/log/vmkernel.log file, you see the entries similar to:

failed H:0x0 D:0x2 P:0x0 Valid sense data: 0xe 0x1d 0x0

• Virtual machine gets sluggish or frozen.

Note: The preceding log excerpts are only examples. Date, time, and environmental variables may vary depending on your environment.

Environment

VMware vSphere ESXi 6.5

Cause

This  issue is caused by an erroneous code that was introduced in ESX 6.5 U1.

Resolution

This is a known issue affecting ESXi 6.5 Update 1.

To resolve this issue, upgrade ESXi host to ESXi 6.5 Patch 2 or later.

Additional Information

简体中文：升级到 ESXi 6.5 U1 后在 vmkernel 日志中看到大量 ATS 不匹配消息