Comparison of Azure Managed Disk types

Annotated comparison table derived from official Azure documentation -

	Ultra disk	Premium SSD	Standard SSD	Standard HDD
Disk type	SSD	SSD	SSD	HDD
Scenario	IO-intensive workloads such as SAP HANA, top tier databases (for example, SQL, Oracle), and other transaction-heavy workloads.	Production and performance sensitive workloads	Web servers, lightly used enterprise applications and dev/test	Backup, non-critical, infrequent access
Max disk size	65,536 gibibyte (GiB) Range - Fixed sizes from 4 GiB up to 64 TiB	32,767 GiB	32,767 GiB	32,767 GiB
Max throughput	2,000 MiB/s Range - 256 KiB/s for each provisioned IOPS to 2000 MBps per disk	900 MiB/s	750 MiB/s	500 MiB/s
Max IOPS	160,000 Range - 300 IOPS/GiB to 160 K IOPS per disk	20,000	6,000	2,000
Notes Outbound data transfers (data going out of Azure data centers) incur billing for bandwidth usage	Some of the current limitations: - Supported only in regions - Can only be used with availability zones (availability sets and single VM deployments outside of zones will not have the ability to attach an ultra disk) - Are only supported on ES/DS v3 VMs * Can only be used as data disks * Ultra disk VM reservation fee if ultra disk capability is enabled but ultra disk  not attached	- Can only be used with VM series that are premium storage-compatible.	- Like standard HDDs, standard SSDs are available on all Azure VMs

Also see - A Review of Azure Services through Comparison Charts & Summary Tables