Disk expanding issue - Why does it converts Basic to Dynamic ?

Thangavel Vaiyapuri 0 Reputation points
2024-04-05T08:46:17.85+00:00

Hi,

We tried to expand a existing Basic disk in Azure VM - SQL server with Datacenter 2022.

But it was added as a Dynamic disk and shows a pop up that "Are you sure you want to convert Basic to Dynamic". We proceeded by clicking OK.

We didnt face the same issue while expanding basic disk in another server with Datacenter 2019

Questions:

  1. Why does it create a Dynamic disk eventhough we expanded the Basic disk the standard wayfrom Azure portal? And it shows "SQLVMstoragePool1" after expading from portal (attached screenshot)
  2. We couldnt see LUN number in the disk properties ? Instaed it shows "on Microsoft Storage Spaces Controller"(attached screenshot)
  3. Does it impact any performance as it is a data disk in SQL server ?
  4. Is it a common behaviour in latest Datacenters above 2022?

Please let us know your inputs!

Thanks in advance!

Br,

V.Thangavel

No-LUN ID.png

Dynamic-Basic.png

SQL Server
SQL Server
A family of Microsoft relational database management and analysis systems for e-commerce, line-of-business, and data warehousing solutions.
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Azure Disk Storage
Azure Disk Storage
A high-performance, durable block storage designed to be used with Azure Virtual Machines and Azure VMware Solution.
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  1. Anand Prakash Yadav 6,085 Reputation points Microsoft Vendor
    2024-04-05T12:47:03.1766667+00:00

    Hello Thangavel Vaiyapuri,

    Thank you for posting your query here!

    When you expand a basic disk in Azure, it may convert to a dynamic disk if the disk is part of a storage pool. This is because Storage Spaces, can group two or more drives together in a storage pool and then use capacity from that pool to create virtual drives called storage spaces.

    Please note that if you are running Storage Spaces Direct in a virtualized storage environment, including in Azure, resizing or changing the characteristics of the storage devices used by the virtual machines isn't supported and will cause data to become inaccessible.

    To use Storage Spaces, you can add more Disks - but can't resize an existing one, to increase the pool. Similar post for reference: https://learn.microsoft.com/en-us/answers/questions/1315027/convert-to-dynamic-disk-when-i-extend-disk-on-vm

    I hope this helps! Please let me know if the issue persists or if you have any other questions.

    Please do not forget to "Accept the answer” and “up-vote” wherever the information provided helps you, this can be beneficial to other community members.