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Support matrix for Azure file share backup

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This article summarizes the supported settings and limitations when backing up Azure file shares by using Azure Backup.

You can use the Azure Backup service to back up Azure file shares. This article summarizes support settings when you back up Azure file shares with Azure Backup.

Note

Azure Backup currently doesn't support NFS shares.

Supported regions

Choose a backup tier:

Azure file shares backup is available in all regions, except for Germany Central (Sovereign), Germany Northeast (Sovereign), China East, China North, France South, and US Gov Iowa.

Supported regions for Cross Subscription Backup (preview)

Cross Subscription Backup (CSB) for Azure File share (preview) is currently available in the following regions: East Asia, Southeast Asia, UK South, UK West, Central India.

Supported storage accounts

Choose a backup tier:

Storage account details Support
Account Kind Azure Backup supports Azure file shares present in general-purpose v1, general-purpose v2, and file storage type storage accounts
Performance Azure Backup supports file shares in both standard and Premium Storage accounts
Replication Azure file shares in storage accounts with any replication type are supported
Firewall enabled Azure file shares in storage accounts with Firewall rules that allow Microsoft Azure Services to access storage account are supported

Supported file shares

Choose a backup tier:

File share type Support
Standard (with large file shares enabled) Supported
Large Supported
Premium Supported
File shares connected with Azure File Sync service Supported

Protection limits

Setting Limit
Maximum number of file shares that can be protected per vault per day 200
Maximum number of storage accounts that can be registered per vault per day 50
Maximum number of file shares that can be protected per vault 2000
Maximum number of storage accounts that can be registered per vault 200

Backup limits

Choose a backup tier:

Setting Limit
Maximum number of on-demand backups per day 10
Maximum number of scheduled backups per day 6

Restore limits

Choose a backup tier:

Setting Limit
Maximum number of restore per day 20
Maximum size of a file (if the destination account is in a Vnet) 1TB
Maximum number of individual files or folders per restore, if ILR (Item level recovery) 99
Maximum recommended restore size per restore for large file shares 15 TiB
Maximum duration of a restore job 15 days

Retention limits

Choose a backup tier:

Setting Limit
Maximum total recovery points per file share at any point in time 200
Maximum retention of recovery point created by on-demand backup 10 years
Maximum retention of daily recovery points (snapshots) per file share, if daily frequency 200 days
Maximum retention of daily recovery points (snapshots) per file share, if hourly frequency Floor (200/number of snapshots according to the schedule)-1
Maximum retention of weekly recovery points (snapshots) per file share 200 weeks
Maximum retention of monthly recovery points (snapshots) per file share 120 months
Maximum retention of yearly recovery points (snapshots) per file share 10 years

Supported restore methods

Choose a backup tier:

Restore method Details
Full Share Restore You can restore the complete file share to the original or an alternate location
Item Level Restore You can restore individual files and folders to the original or an alternate location

Daylight savings

Azure Backup doesn't support automatic clock adjustment for daylight saving time for Azure VM backups. It doesn't shift the hour of the backup forward or backwards. To ensure the backup runs at the desired time, modify the backup policies manually as required.

Support for customer-managed failover

This section describes how your backups and restores are affected after customer-managed failovers.

The following table lists the behavior of backups due to customer-initiated failovers:

Failover type Backups Restore Enabling protection (re-protection) of failed over account in secondary region
Customer-managed planned failover Supported Supported Not supported
Customer-managed unplanned failover Not supported Only cross-region restore from the vault is supported. Not supported

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