Azure Disk Storage
High-performance, highly durable block storage for Azure Virtual Machines
Choose the right disk storage for your performance and price needs
Designed to be used with Azure Virtual Machines, Azure Disk Storage offers high-performance, highly durable block storage for your mission- and business-critical applications. Choose from four disk storage options-Ultra Disk Storage, Premium SSD, Standard SSD, and Standard HDD-to optimize costs and performance for your workload needs. Achieve sub-millisecond latency with high performance for throughput and transaction-intensive workloads such as SAP HANA, SQL Server, and Oracle®.
Built-in bursting capabilities on smaller disk sizes to handle unexpected traffic and process batch jobs cost-effectively
0 percent annual failure rate for consistent enterprise-grade durability
Dynamic scaling of disk performance on Ultra Disk Storage without disruption
Automatic encryption to help protect your data using Microsoft-managed keys or your own
Maximize your investments and business impact
Optimize costs and get the precise storage you need for your workloads. Disk options come in sizes from 4 GB to 64 TB at a variety of price points and performance characteristics. Lower your total cost of ownership by reserving disk storage in advance. SQL Server on Azure VMs with Azure Disk Storage delivers better price-performance—up to 3.6 times faster and 84 percent cheaper than AWS EC21.
Ensure business continuity and minimize disruptions
Run business-critical applications confidently with disk storage designed for 99.999 percent availability and integrated with availability sets and availability zones to avoid costly downtimes. Azure offers 0 percent annualized failure rate durability and a single-instance service-level agreement of 99.9 percent availability. Minimize disruption to your business with support from Azure Backup and Azure Site Recovery.
Scale easily and quickly to meet business needs
Get the performance and capacity you need, and scale up from gigabytes to petabytes of storage. Achieve high performance even at low storage capacities - Ultra Disk Storage offers the flexibility to configure your IOPS, throughput, and capacity independently. Create and manage disks by simply selecting the disk type and size.
Use cases and workloads
Scale to meet your performance needs for handling top-tier databases such as SQL Server, Oracle, and SAP HANA.
Achieve consistent low latency for latency-sensitive NoSQL databases such as MongoDB, Cassandra, and CouchDB.
Backup and disaster recovery
Minimize disruptions, lower costs, and reduce time spent on backup and recovery with point-in-time snapshots and solutions built by Microsoft partners.
Easily migrate your on-premises Windows- and Linux-based clustered or high-availability applications to Azure. Run your most demanding enterprise applications—such as clustered databases, parallel file systems, persistent containers, and machine learning applications—in the cloud.
Take advantage of high-performance, low-latency block storage for mission-critical stateful applications running in Kubernetes.
Access more capabilities through Microsoft partners
Tap into a rich partner ecosystem offering a wide range of solutions for database migration, backup, and disaster recovery. Microsoft partners use the unique REST API support capability in Disk Storage to build solutions at lower costs.
Enhanced security and compliance
Microsoft invests more than USD 1 billion annually on cybersecurity research and development.
We employ more than 3,500 security experts who are dedicated to data security and privacy.
Azure has more certifications than any other cloud provider. View the comprehensive list.
Disk Storage resources and documentation
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Trusted by companies of all sizes
Marco Montesi, CloudOps Software Engineer, TeamSystem
"Using the Azure Ultra Disk Storage managed disk service, we can provide higher performance for more customers at the same time, which helps us meet our operational cost reduction targets."
Matt Douglas, Chief Enterprise Architect, Sentara Healthcare
"Our tests with Azure Ultra Disk Storage have far surpassed our current production system—up to four times our current workload capacity. As a healthcare organization, we are breaking down barriers with Ultra Disk Storage and the M-series virtual machines."
Takaya Segawa, General Manager/Creative Officer, SEGA
"Ultra Disk Storage enabled SEGA to seamlessly migrate from our on-premises datacenter to Azure and take advantage of flexible performance controls."
Amit Patolia, Storage Engineer, Devon Energy
"With Ultra Disk Storage, we achieved consistent sub-millisecond latency at high IOPS and throughput levels on a wide range of disk sizes. Ultra Disk Storage also allows us to fine-tune performance characteristics based on the workload."
Azure Disk Storage updates, blogs, and announcements
Azure Backup: Operational backup for Azure Blobs is now in public preview
Resource instance rules for access to Azure Storage now in public preview
Generally available: Copy Blob support over private endpoints in Azure Storage
Public preview: Prevent Shared Key authorization on Azure Storage accounts
Azure Storage account recovery available via portal is now generally available
Azure resource logs for Azure Storage is now in public preview
Azure Storage blob inventory public preview
Azure Data Lake Storage Gen2 recursive access control list (ACL) update is generally available
Policy to control the minimum TLS version used with Azure Storage now generally available
Frequently asked questions about Disk Storage
Data disks on Ultra Disk Storage hold up to 64 TB per disk. Data disks on Premium SSD, Standard SSD, and Standard HDD hold up to 32 TB. The number of data disks you can use depends on the size of the virtual machine.
Each of the four disk types differs in performance characteristics, so you can configure your storage based on your application needs. Learn about performance guidelines for Ultra Disk Storage or Premium SSDs.
After you purchase a reservation, a discount is automatically applied to the disk resources that match the terms of your reservation. The reservation discount applies to disk SKUs only. Learn more about reservation discounts.
Bursting is enabled by default on new and existing deployments of the supported virtual machines and disks—no additional steps required. Learn more about bursting.
1Price-performance claims based on data from a study commissioned by Microsoft and conducted by GigaOm in February 2020. The study compared price performance between SQL Server 2019 Enterprise Edition on Windows Server 2019 Datacenter edition in Azure E32as_v4 instance type with P30 Premium SSD Disks and the SQL Server 2019 Enterprise edition on Windows Server 2019 Datacenter edition in AWS EC2 r5a.8xlarge instance type with General Purpose (gp2) volumes. Benchmark data is taken from a GigaOm Analytic Field Test derived from a recognized industry standard, TPC Benchmark™ E (TPC-E). The Field Test does not implement the full TPC-E benchmark and as such is not comparable to any published TPC-E benchmarks. Prices are based on publicly available US pricing in West US for SQL Server on Azure Virtual Machines and Northern California for AWS EC2 as of January 2020. The pricing incorporates three-year reservations for Azure and AWS compute pricing, and Azure Hybrid Benefit for SQL Server and Azure Hybrid Benefit for Windows Server and License Mobility for SQL Server in AWS, excluding Software Assurance costs. Actual results and prices may vary based on configuration and region.