Symptoms:
Recent upgrade to ESXi 7.0.3 Build: 18644231
Thin provisioned virtual disks (VMDKs) residing on VMFS6 datastores may cause multiple hosts in an HA cluster to fail with a purple diagnostic screen
Resolution:
This is a known issue in VMware vSphere ESXi 7.0 Update 3 release currently there is no resolution. If you experience this issue please contact VMware support and reference this article
Workaround:
There are a few options that customers have to work around this issue. Please note that any of these workarounds will prevent the issue from happening customers only need to choose the workaround that is best for their situation
1. Revert to the previous version of ESXi that is not impacted by this concern https://kb.vmware.com/s/article/1033604
2. Convert thin VMDKs to Thick or EZT provisioning
Determine the Virtual Disk Format and Convert a Virtual Disk from the Thin Provision Format to a Thick Provision Format
https://docs.vmware.com/en/VMware-vSphere/7.0/com.vmware.vsphere.vm_admin.doc/GUID-E8F50BEC-F575-4AB1-BC77-D9A13CDBDCF7.html
3. Disable TRIM/UNMAP in the Guest OS
Please consult OS documentation on how to adjust TRIM/UNMAP features for a complete understanding of the OS specific configurations needs. Note: functions and capabilities may vary across distributions and versions based on OS specifics