-A cache storage account is a standard storage account in the same Azure region as the virtual machine being replicated. The cache storage account is used to hold replication changes temporarily, before the changes are moved to the recovery Azure region. High churn support is also available in Azure Site Recovery to get higher churn limits. To use this feature, please create a Premium Block Blob type of storage accounts and then use it as the cache storage account. Azure Site Recovery for Premium SSD v2 disks (preview) is supported only using high churn. Use SkuName Premium_LRS to enable high churn. You can choose to, but it's not necessary, to specify different cache storage accounts for the different disks of a virtual machine. If you use different cache storage accounts, ensure they are of the same type (Standard or Premium Block Blobs). For more information, see [Azure VM Disaster Recovery - High Churn Support](./concepts-azure-to-azure-high-churn-support.md).
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