---
title: "esx.problem.vmfs.ats.support.lost"
description: "ATS (Atomic Test & Set) support has been lost for this VMFS volume. There is a storage configuration issue with this device. Review the event description for detail on the cause. Review storage configuration."
canonical: "https://helpcenter.veeam.com/docs/mp/kb/h.esx.problem.vmfs.ats.support.lost.html"
breadcrumb: "Veeam MP for VMware Online Knowledge Base > Event-Based Rules > vSphere Host Storage Error > esx.problem.vmfs.ats.support.lost"
dateModified: "2026-09-10"
---

# esx.problem.vmfs.ats.support.lost

## Summary

ATS (Atomic Test & Set) support has been lost for this VMFS volume.

## Causes

There is a storage configuration issue with this device. Review the event description for detail on the cause.

## Resolutions

Review storage configuration. Review VMware online documents such as [vSphere Storage Guide](https://docs.vmware.com/en/VMware-vSphere/7.0/com.vmware.vsphere.storage.doc/GUID-8AE88758-20C1-4873-99C7-181EF9ACFA70.html) to resolve issues.

## External

Refer to the [VMware Online Documentation](https://techdocs.broadcom.com/) for more information on vCenter event messages and possible solutions.