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This article summarizes the scenarios that shared disk in Azure Site Recovery supports for each workload type.
Supported scenarios
The following table lists the supported scenarios for shared disk in Azure Site Recovery:
| Scenarios | Supported workloads |
|---|---|
| Azure to Azure disaster recovery | Supported for Regional/Zonal disaster recovery - Azure to Azure |
| Platform | Windows virtual machines |
| Server SKU | Windows 2016 and later |
| Clustering configuration | Active-Passive |
| Clustering solution | Windows Server Failover Clustering (WSFC) |
| Shared disk type | Standard SSD, Premium SSD, Premium SSD v2 and Ultra disks |
| Disk partitioning type | Basic |
| Maximum cluster nodes | Four |
| Recovery points | Crash-consistent only |
| Protected disk topology | The same shared-disk set must be attached to every protected node |
Unsupported scenarios
Following are the unsupported scenarios for shared disk in Azure Site Recovery:
- Active-Active clusters
- Linux and Pacemaker clusters
- Protecting multiple clusters as a group
- Protecting cluster + non-clustered virtual machines in a group
- Recovery plans
- Application-consistent recovery points
- Adding a shared disk to an already protected cluster. Disable and re-enable protection for the complete cluster configuration.
- Non-clustered distributed appliances without using WSFC
- Configuring replication for Azure virtual machines that are attached to different shared disks within a single cluster. To protect a cluster in Azure Site Recovery, you must attach the same set of shared disks to all the virtual machines you're protecting in that cluster.
Disaster recovery support
The following table lists the disaster recovery support for shared disk in Azure Site Recovery:
| Disaster recovery support | Source disk redundancy | Site Recovery behavior | Target disk redundancy |
|---|---|---|---|
| Zonal disaster recovery | ZRS | Not supported | Not applicable |
| Zonal disaster recovery | LRS | Supported | LRS |
| Regional disaster recovery | ZRS | Supported | ZRS |
| Regional disaster recovery | LRS | Supported | LRS, or ZRS for Standard SSD and Premium SSD v1 when available |
Premium SSD v2 and Ultra Disk support LRS only.
Next steps
Learn about setting up disaster recovery for Azure virtual machines using shared disk.