---
title: "Veeam VMware: Errors occurred on the disk(s) of a Virtual SAN host Alarm"
description: "This monitor tracks the vCenter Alarm 'Errors occurred on the disk(s) of a Virtual SAN host'. By default, the alarm is triggered by the following event: esx.problem.vob.vsan.lsom.diskerror: The virtual SAN device encountered a permanent error when..."
canonical: "https://helpcenter.veeam.com/docs/mp/kb/errors_on_vsan_host.html"
breadcrumb: "Veeam MP for VMware Online Knowledge Base > vCenter Server Alarms > Veeam VMware: Errors occurred on the disk(s) of a Virtual SAN host Alarm"
dateModified: "2026-09-10"
---

# Veeam VMware: Errors occurred on the disk(s) of a Virtual SAN host Alarm

This monitor tracks the vCenter Alarm 'Errors occurred on the disk(s) of a Virtual SAN host'.

By default, the alarm is triggered by the following event:

- **esx.problem.vob.vsan.lsom.diskerror**: The virtual SAN device encountered a permanent error when devices were not readable or writable.

For more information on the issue, see this [VMware KB article](https://knowledge.broadcom.com/external/article/391710/permanent-disk-failure-in-vsan.html).

::: note

This alarm does not resolve be default; go to the vSphere Client and clear the alarm manually.

:::

See the [Help Center](https://www.veeam.com/documentation-guides-datasheets.html?prd=mp) for more information including reference lists of all Rules and Monitors and full set of User Guides for the Veeam MP for VMware.

See the [VMware Online Documentation](https://docs.vmware.com/) for more information on VMware vSphere, in particular:

- [Troubleshooting Guide](https://docs.vmware.com/en/VMware-vSphere/7.0/com.vmware.vsphere.networking.doc/GUID-DE119813-63A7-4B68-924D-1ED95F6EFFD7.html)
- [Resource Management Guide](https://docs.vmware.com/en/VMware-vSphere/7.0/com.vmware.vsphere.resmgmt.doc/GUID-98BD5A8A-260A-494F-BAAE-74781F5C4B87.html)
- [Networking Guide](https://docs.vmware.com/en/VMware-vSphere/7.0/com.vmware.vsphere.networking.doc/GUID-35B40B0B-0C13-43B2-BC85-18C9C91BE2D4.html)
- [Storage Guide](https://docs.vmware.com/en/VMware-vSphere/7.0/com.vmware.vsphere.storage.doc/GUID-8AE88758-20C1-4873-99C7-181EF9ACFA70.html)