Azure Disk Storage
High-performance, highly durable block storage for Azure Virtual Machines
Disk storage for your mission- and business-critical workloads
Designed to be used with Azure Virtual Machines, Azure Disk Storage offers high-performance, highly durable block storage for your mission- and business-critical workloads. Choose from four disk storage options—Ultra Disk Storage, Premium SSD, Standard SSD and Standard HDD—to optimise 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 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
Optimise 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 mission- and business-critical workloads confidently with 99.999 percent availability and availability sets and availability zones to avoid costly downtimes. Azure offers 0 percent annualised 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 is the highest-performing disk in the cloud. Create and manage disks by simply selecting the disk type and size.
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 Azure Disk Storage to build solutions at lower costs.
Enhanced security and compliance
Microsoft invests more than $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 compliance certifications than any other cloud provider. View the comprehensive list.
Get the disk storage you need at competitive prices
Choose from four types of managed disks—Ultra Disk Storage, Premium SSD, Standard SSD and Standard HDD—and use multiple managed disks with each VM. Use the pricing calculator to configure and estimate the cost of your disk storage.See Azure Disk Storage pricing
Azure Disk Storage resources and documentation
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Trusted by companies of all sizes
"Ultra Disk Storage enabled SEGA to seamlessly migrate from our on-premises datacenter to Azure and take advantage of flexible performance controls."Takaya Segawa, General Manager/Creative Officer, SEGA
"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."Amit Patolia, Storage Engineer, DEVON ENERGY
Frequently asked questions about Azure 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 Datacentre edition in Azure E32as_v4 instance type with P30 Premium SSD Disks and the SQL Server 2019 Enterprise Edition on Windows Server 2019 Datacentre 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 recognised 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.