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AVS private cloud maintenance mandates for readiness
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articles/azure-vmware/architecture-identity.md

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- [Details of each privilege](https://techdocs.broadcom.com/us/en/vmware-cis/vsphere/vsphere/8-0/vsphere-security-8-0/defined-privileges.html)
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- [How Azure VMware Solution monitors and repairs private clouds](azure-vmware-solution-private-cloud-maintenance-best-practices.md#host-monitoring-and-remediation)
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- [How Azure VMware Solution monitors and repairs private clouds](azure-vmware-solution-private-cloud-maintenance.md#host-monitoring-and-remediation)
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<!-- LINKS - external-->
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[VMware product documentation]: https://techdocs.broadcom.com/us/en/vmware-cis/vsphere/vsphere/8-0/vsphere-security-8-0/defined-privileges.html

articles/azure-vmware/architecture-private-clouds.md

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Now that you learned about Azure VMware Solution private cloud concepts, you might want to read:
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- [Azure VMware Solution networking and interconnectivity concepts](architecture-networking.md)
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- [Azure VMware Solution private cloud maintenance best practices](azure-vmware-solution-private-cloud-maintenance-best-practices.md)
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- [Azure VMware Solution private cloud maintenance](azure-vmware-solution-private-cloud-maintenance.md)
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- [Azure VMware Solution storage concepts](architecture-storage.md)
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- [Enable an Azure VMware Solution resource](deploy-azure-vmware-solution.md#register-the-microsoftavs-resource-provider)
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articles/azure-vmware/azure-vmware-solution-platform-updates.md

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# What's new in Azure VMware Solution
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Microsoft regularly applies important updates to the Azure VMware Solution for new features and software lifecycle management. You should receive a notification through Azure Service Health that includes the timeline of the maintenance. For more information, see [Host maintenance and lifecycle management](azure-vmware-solution-private-cloud-maintenance-best-practices.md#host-maintenance-and-lifecycle-management).
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Microsoft regularly applies important updates to the Azure VMware Solution for new features and software lifecycle management. You should receive a notification through Azure Service Health that includes the timeline of the maintenance. For more information, see [Host maintenance and lifecycle management](azure-vmware-solution-private-cloud-maintenance.md#host-maintenance-and-lifecycle-management).
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## December 2025
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**Resource Health for Azure VMware Solution**
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Resource Health for Azure VMware Solution is now Generally Available! Resource Health, an Azure native feature, monitors the health of an Azure VMware Solution private cloud and suggests actions for existing issues. Setup Azure Monitor notifications on top of these alerts to notify stakeholders to remediate and ensure the private cloud is in a healthy and maintainable state. [Learn more](resource-health-for-azure-vmware-solution-overview.md)
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Resource Health for Azure VMware Solution is now Generally Available! Resource Health, an Azure native feature, monitors the health of an Azure VMware Solution private cloud and suggests actions for existing issues. Set up Azure Monitor notifications on top of these alerts to notify stakeholders to remediate and ensure the private cloud is in a healthy and maintainable state. [Learn more](resource-health-for-azure-vmware-solution-overview.md)
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## November 2025
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articles/azure-vmware/azure-vmware-solution-private-cloud-maintenance-best-practices.md renamed to articles/azure-vmware/azure-vmware-solution-private-cloud-maintenance.md

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---
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title: Azure VMware Solution - private cloud maintenance best practices
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description: Understand the best practices and recommendations to maintain Azure VMware Solution private cloud
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title: Azure VMware Solution - private cloud maintenance
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description: Ensuring seamless, reliably maintaintenance of Azure VMware Solution private cloud
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ms.topic: concept-article
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ms.service: azure-vmware
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ms.date: 03/25/2025
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# Customer intent: "As an IT administrator managing Azure VMware Solution, I want to follow best practices for private cloud maintenance and monitoring, so that I can ensure optimal performance and minimize downtime during updates."
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# Customer intent: "As an IT administrator managing Azure VMware Solution, I want to ensure optimal performance and minimize downtime during updates."
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---
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# Azure VMware Solution private cloud maintenance best practices
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# Azure VMware Solution private cloud maintenance
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Azure VMware Solution undertakes periodic maintenance of the private cloud. This maintenance includes security patches, minor and major updates to VMware software stack. This page describes the host monitoring, remediation, and recommended best practices that help keep the private cloud ready for maintenance.
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Azure VMware Solution undertakes periodic maintenance of the private cloud. This maintenance includes security patches, minor and major updates to VMware software stack. This page describes the host monitoring, remediation, and mandatory steps that keep the private cloud ready for maintenance.
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## Host maintenance and lifecycle management
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- Storage status
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- Connection failure
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## Maintenance Operations Best Practices
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The following actions are always recommended for ensuring host maintenance operations are carried out successfully:
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## Actions to ensure private cloud is maintenance-ready
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The following actions are necessary for ensuring host maintenance operations are carried out successfully:
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- **vSAN storage utilization:** To maintain Service Level Agreement (SLA), ensure that your vSphere cluster's storage space utilization remains below 75%. If the utilization exceeds 75%, upgrades may take longer than expected or fail entirely. If your storage utilization exceeds 75%, consider adding a node to expand the cluster and prevent potential downtime during upgrades.
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- **Distributed Resource Scheduler (DRS) rules:** DRS VM-VM anti-affinity rules must be configured in a way to have at least (N+1) hosts in the cluster, where N is the number of VMs part of DRS rule.
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- **Failures To Tolerate (FTT) violation:** To prevent data loss, change VMs configured with a vSAN storage policy for Failures to Tolerate (FTT) of 0 to a vSAN storage policy compliant with [Microsoft SLA](https://www.microsoft.com/licensing/docs/view/Service-Level-Agreements-SLA-for-Online-Services?lang=1) (FTT=1 for up to five hosts in a cluster and FTT=2 for six or more hosts in a cluster) and ensure host maintenance operations can carried out seamlessly.
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## Next steps
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Now that you've covered Azure VMware Solution private cloud maintenance best practices, you might want to learn about:
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Now that you've learnt how to ensure seamless Azure VMware Solution private cloud maintenance, you might want to learn about:
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- [How to configure Resource Health alerts for Azure VMware Solution](configure-azure-monitor-for-resource-health-for-azure-vmware-solution.md)
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- [Azure VMware Solution networking and interconnectivity concepts](architecture-networking.md)

articles/azure-vmware/resource-health-for-azure-vmware-solution-overview.md

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|23 |Private cloud has 90 or more hosts ([AVS supports a maximum of 96 hosts in a private cloud](/azure/azure-vmware/architecture-private-clouds#clusters); consider a new private cloud for additional hosts) |Customer intervention required|
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|24 |Virtual Machine is configured to use an external device that prevents maintenance operations |Customer intervention required|
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|25 |Virtual Machine configured with DRS Override set to "Disabled" mode (EPC_DRSOVERRIDERULE) |Customer intervention required|
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|26 |CD-ROM is mounted on the Virtual Machine and its ISO image isn't accessible and blocks maintenance operations. For more information, refer to [AVS SDDC maintenance best practices](azure-vmware-solution-private-cloud-maintenance-best-practices.md#maintenance-operations-best-practices) (EPC_CDROM_EMULATEMODE) |Customer intervention required|
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|27 |Virtual Machine is configured with Small Computer System Interface (SCSI) bus sharing in "virtual mode" and blocks maintenance operations (EPC_SCSIDEVICE_SHARINGMODE). For more information, refer to [AVS SDDC maintenance best practices](azure-vmware-solution-private-cloud-maintenance-best-practices.md#maintenance-operations-best-practices) |Customer intervention required|
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|26 |CD-ROM is mounted on the Virtual Machine and its ISO image isn't accessible and blocks maintenance operations. For more information, refer to [AVS SDDC maintenance](azure-vmware-solution-private-cloud-maintenance.md#actions-to-ensure-private-cloud-is-maintenance-ready) (EPC_CDROM_EMULATEMODE) |Customer intervention required|
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|27 |Virtual Machine is configured with Small Computer System Interface (SCSI) bus sharing in "virtual mode" and blocks maintenance operations (EPC_SCSIDEVICE_SHARINGMODE). For more information, refer to [AVS SDDC maintenance](azure-vmware-solution-private-cloud-maintenance.md#actions-to-ensure-private-cloud-is-maintenance-ready) |Customer intervention required|
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|28 |External datastore mounted becomes inaccessible and will block maintenance operations (EPC_DATASTORE_INACCESSIBLE) |Customer intervention required|
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|29 |Connected network adapter becomes inaccessible and blocks any maintenance operations (EPC_NWADAPTER_STALE) |Customer intervention required|
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|30 |Virtual Machine’s serial port is connected to a device that can't be accessed on the destination host (EPC_SERIAL_PORT) |Customer intervention required|

articles/azure-vmware/toc.yml

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href: plan-private-cloud-deployment.md
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- name: Deploy Azure VMware Solution
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href: deploy-azure-vmware-solution.md
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- name: Azure VMware Solution private cloud maintenance best practices
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href: azure-vmware-solution-private-cloud-maintenance-best-practices.md
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- name: Azure VMware Solution private cloud maintenance
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href: azure-vmware-solution-private-cloud-maintenance.md
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- name: Deploy vSAN stretched clusters
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href: deploy-vsan-stretched-clusters.md
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- name: Create a placement policy

redirects/.openpublishing.redirection.azure-vmware.json

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