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Disk Drives In Microsoft Azure

Hard Disk Drive (HDD) Vs. Solid State Drive (SSD)

Data Tier

1. Hot tier → Data which is frequently accessed
2. Cold tier → Data which is less frequently accessed and stored for at least 30 days
3. Archive tier → Data which is rarely accessed and stored for at least 180 days

Different Storage Type

1. Standard HDD → This disk is used for
   1. Web servers
   2. Lightly used enterprise application
   3. Dev/test machine
2. Standard SSD → This disk is used for
   1. Back up
   2. Non-critical applications
   3. Applications or data that requires infrequent access
3. Premium SSD → Used in production and performance sensitive workloads
4. Ultra disk → Basically used for transaction heavy workload
Premium SSD is the most expensive storage. Here is the table with different parameters




Click to Enlarge

Managed And Unmanaged Disk

Provisioned IOPS Vs Provisioned Throughput