# Managed Disks

## Azure Managed Disks — commitment brief

> **Data sourced**: March 2026. Verify current figures at the [Azure Pricing Calculator](https://azure.microsoft.com/en-us/pricing/calculator/).

### Coverage summary

Azure Managed Disks supports reserved capacity exclusively for **Premium SSD disks at P30 and larger** (P30–P80). Reservations are purchased per disk, per SKU, per region. Ultra Disk and Premium SSD v2 are not eligible for reservations, nor are Standard SSD or Standard HDD tiers. Discount percentages are shown dynamically in the Azure portal at purchase time and are not published as a fixed table — official documentation currently confirms only a 1-year term for managed disk reservations. No Compute Savings Plan or other Azure-wide savings plan covers disk storage costs.

**What is covered**: The hourly compute cost of Premium SSD managed disks at the reserved SKU in the specified region. The reservation applies regardless of whether the disk is attached to a running VM.

**What is not covered**: Disk snapshots (always billed at pay-as-you-go rates), Ultra Disk, Premium SSD v2, Standard SSD, Standard HDD, Premium SSD SKUs smaller than P30 (P1–P20), disks in Azure Government/China regions.

### Azure Hybrid Benefit

> Not applicable. Azure Hybrid Benefit covers OS/software licenses for compute and has no applicability to managed disk costs.

### SKU / tier coverage

| SKU / Tier                   | Reservation | Savings Plan | 1-yr discount    | 3-yr discount | Notes                         |
| ---------------------------- | ----------- | ------------ | ---------------- | ------------- | ----------------------------- |
| Premium SSD P30 (1,024 GiB)  | ✅ Yes       | ❌ No         | varies by region | unconfirmed   | Minimum eligible SKU          |
| Premium SSD P40 (2,048 GiB)  | ✅ Yes       | ❌ No         | varies by region | unconfirmed   |                               |
| Premium SSD P50 (4,096 GiB)  | ✅ Yes       | ❌ No         | varies by region | unconfirmed   |                               |
| Premium SSD P60 (8,192 GiB)  | ✅ Yes       | ❌ No         | varies by region | unconfirmed   |                               |
| Premium SSD P70 (16,384 GiB) | ✅ Yes       | ❌ No         | varies by region | unconfirmed   |                               |
| Premium SSD P80 (32,767 GiB) | ✅ Yes       | ❌ No         | varies by region | unconfirmed   | Maximum eligible SKU          |
| Premium SSD P1–P20           | ❌ No        | ❌ No         | —                | —             | Below minimum eligible size   |
| Premium SSD v2               | ❌ No        | ❌ No         | —                | —             | Not eligible for reservations |
| Ultra Disk                   | ❌ No        | ❌ No         | —                | —             | Not eligible for reservations |
| Standard SSD                 | ❌ No        | ❌ No         | —                | —             | Not eligible                  |
| Standard HDD                 | ❌ No        | ❌ No         | —                | —             | Not eligible                  |

### Reservation vs. savings plan

**Reservation**: The only commitment instrument available for managed disk costs. Scoped to a specific Premium SSD SKU (P30–P80) and region. Reservations are purchased per disk — they do not pool across sizes. Exact discount percentages are shown in the Azure portal reservation purchase blade for your selected SKU and region.

## Regional availability

Azure Managed Disks reservations (Premium SSD P30–P80) are available in all commercial Azure production regions. Microsoft's documentation explicitly states that reservations are offered "in all production regions" for eligible SKUs.

**Notable exclusions**: "Reservation discounts are currently unavailable for... Disks in Azure Government, Azure Germany, or Microsoft Azure operated by 21Vianet regions." (per [Microsoft Learn](https://learn.microsoft.com/en-us/azure/virtual-machines/disks-reserved-capacity)). Ultra Disk and Premium SSD v2 are not eligible for reservations in any region.

⚠️ Availability varies by SKU and region. Always verify in the [Azure portal](https://portal.azure.com) or via the [Azure Retail Pricing API](https://prices.azure.com/api/retail/prices) before purchasing.

### Archera

Azure Managed Disks (Premium SSD P30–P80) reserved capacity is within Archera's commitment management scope. Archera can automate reservation purchase per disk SKU and region, monitor disk utilization against reserved capacity, and wrap commitments in a GRI/GSP — eliminating downside risk on over-committed disk reservations.

***

**Sources**

* [Reduce costs with Azure Disks Reservation](https://learn.microsoft.com/en-us/azure/virtual-machines/disks-reserved-capacity)
* [Understand how reservation discounts apply to Azure disk storage](https://learn.microsoft.com/en-us/azure/cost-management-billing/reservations/understand-disk-reservations)
* [Azure Managed Disks pricing](https://azure.microsoft.com/en-us/pricing/details/managed-disks/)

⚠️ Discount percentages are not published as a fixed table by Microsoft — exact rates are shown in the Azure portal at reservation purchase time. Always verify with the [Azure Pricing Calculator](https://azure.microsoft.com/en-us/pricing/calculator/).


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