Managed Disk Types¶
Azure managed disks offer different performance levels and features. Choosing the right disk type depends on your workload's IOPS, throughput, and latency requirements.
| Disk Type | Max Size | Max IOPS | Max Throughput | Latency | Use Case | Cost Tier |
|---|---|---|---|---|---|---|
| Standard HDD | 32 TiB | 2,000 (up to 3,000 with performance plus) | 500 MB/s | Higher and more variable than SSD | Backup, non-critical | Lowest |
| Standard SSD | 32 TiB | 6,000 | 750 MB/s | Single-digit ms | Web servers, lightly used apps | Low |
| Premium SSD | 32 TiB | 20,000 | 900 MB/s | Single-digit ms | Production, performance-sensitive | Medium |
| Premium SSD v2 | 64 TiB | 80,000 | 1,200 MB/s | < 1ms | SQL Server, Oracle, NoSQL | Medium-High |
| Ultra Disk | 64 TiB | 400,000 | 10,000 MB/s | < 1ms | SAP HANA, transaction-heavy DBs | High |
graph TD
Start([Start Selection]) --> Latency{Sub-millisecond latency?}
Latency -->|Yes| Ultra[Ultra Disk / Premium SSD v2]
Latency -->|No| Workload{Workload Type?}
Workload -->|Production/DB| Premium[Premium SSD]
Workload -->|Web Server/Dev| SSSD[Standard SSD]
Workload -->|Backup/Archive| SHDD[Standard HDD]
Ultra --> Scale{Scale IOPS/MBps independently?}
Scale -->|Yes| UltraDisk[Ultra Disk]
Scale -->|No| PSSDv2[Premium SSD v2]Tip
Standard SSD and Premium SSD disks support bursting. This allows disks to exceed their provisioned performance for short periods to handle sudden traffic spikes.