---
slug: "azure-disk-storage-os-disks-on-standard-hdd-retirement"
title: "Azure Disk Storage: OS disks on Standard HDD retirement"
summary: "Service for operating system (OS) disks on Standard HDD is retired on 8 Sep 2028. OS disks not migrated by then are converted to Standard SSD of equivalent size."
cloud: "azure"
service: "Azure Disk Storage"
service_slug: "disk-storage"
category: "feature"
type: "retirement"
announced_date: "2025-09-08"
effective_date: "2028-09-08"
effective_precision: "day"
replacement: "Standard SSD or Premium SSD"
affected_versions: []
source_url: "https://azure.microsoft.com/updates?id=500157"
extra_source_urls: ["https://learn.microsoft.com/en-us/azure/virtual-machines/ephemeral-os-disks","https://aka.ms/standard-hdd-os-disk-retirement","https://learn.microsoft.com/en-us/azure/virtual-machines/disks-convert-types?tabs=azure-powershell","https://learn.microsoft.com/en-us/azure/virtual-machines/disks-understand-billing"]
vendor_ref: "500157"
last_checked_at: "2026-11-12T09:55:19.345Z"
created_at: "2026-11-13T13:36:44.208Z"
updated_at: "2026-11-13T13:36:44.208Z"
url: "https://eolwatch.dev/items/azure-disk-storage-os-disks-on-standard-hdd-retirement"
short_url: "https://eolwatch.dev/i/af"
markdown_url: "https://eolwatch.dev/items/azure-disk-storage-os-disks-on-standard-hdd-retirement.md"
json_url: "https://eolwatch.dev/items/azure-disk-storage-os-disks-on-standard-hdd-retirement.json"
source_note: null
---

# Azure Disk Storage: OS disks on Standard HDD retirement

Service for operating system (OS) disks on Standard HDD is retired on 8 Sep 2028. OS disks not migrated by then are converted to Standard SSD of equivalent size.

- Effective date: 8 Sep 2028
- Cloud: [Azure](https://eolwatch.dev/cloud/azure.md)
- Service: [Azure Disk Storage](https://eolwatch.dev/services/azure/disk-storage.md)
- Type: Retirement
- Category: [Feature](https://eolwatch.dev/categories/features.md)
- Replacement: Standard SSD or Premium SSD
- Announced: 8 Sep 2025
- Official source: [azure.microsoft.com](https://azure.microsoft.com/updates?id=500157)
- Last checked: 12 Nov 2026

## What breaks

From 8 Sep 2028, service for operating system (OS) disks running on Standard HDD is retired. After the retirement date, OS disks still on Standard HDD are converted to Standard SSD of equivalent size. Microsoft states that migrating before the retirement date avoids a potential service disruption after that date. Standard HDD data disks (non-boot volumes) and ephemeral OS disks are not affected.

## What to do

1. Stop using Standard HDD OS disks for new virtual machines.
2. Migrate existing HDD OS disks to Standard SSD or Premium SSD before the retirement date. See [Convert managed disks storage between different disk types](https://learn.microsoft.com/en-us/azure/virtual-machines/disks-convert-types?tabs=azure-powershell).
3. Review the [Azure Disk Storage billing guidance](https://learn.microsoft.com/en-us/azure/virtual-machines/disks-understand-billing) to select the disk type that fits the workload and budget.
4. Microsoft states that additional details are shared in its [public documentation](https://aka.ms/standard-hdd-os-disk-retirement) before the retirement date.

## Replacement

Standard SSD or Premium SSD

## Sources

- [Official source](https://azure.microsoft.com/updates?id=500157) (azure.microsoft.com, Official)
- [Additional source](https://learn.microsoft.com/en-us/azure/virtual-machines/ephemeral-os-disks) (learn.microsoft.com, Official)
- [Additional source](https://aka.ms/standard-hdd-os-disk-retirement) (aka.ms, Official)
- [Additional source](https://learn.microsoft.com/en-us/azure/virtual-machines/disks-convert-types?tabs=azure-powershell) (learn.microsoft.com, Official)
- [Additional source](https://learn.microsoft.com/en-us/azure/virtual-machines/disks-understand-billing) (learn.microsoft.com, Official)

Last checked against the first source in this list on 12 Nov 2026.

Page: https://eolwatch.dev/items/azure-disk-storage-os-disks-on-standard-hdd-retirement | JSON: https://eolwatch.dev/items/azure-disk-storage-os-disks-on-standard-hdd-retirement.json

The text on this page is drafted with AI assistance from the vendor's text, checked against the official source and approved by a person before it is published.