azure disks

Question

Hello

I am trying to do sizing for 4 Azure vms and each vm have 4 disks.

my question is it mandatory to have storage account in order to have multiple disks per vm or this is irrelevant ?

Answer 1

Hi,

An Azure storage account contains all of your Azure Storage data objects: blobs, files, queues, tables, and disks, to use the Microsoft Azure storage solution, it's necessary to create a Storage Account.

When creating a VM, a storage account will automatically be created, if you want to use more data disks, you can use the same storage account that is being created by the VM or create separate ones, but a storage account is required.

Best regards,
Leon

Answer 2

Hello Leon

When i tried to use Azure calculator if you have multiple disks you are enforced to use the same SKU (E2 for example|) but if i have different size disk per VM what shall i do?

shall i create another storage account and generate these different disks on top of it?

Answer 3

@Moonlight The price of Azure disks scales linear to the size. So 2 x 8GiB disks will cost the same as 1 x 16 GiB disk. In your case you can simply create multiple VMs in the pricing calculator or if your VMs are the same, but with different disk sizes just include the average disk size to get an accurate expected cost. It is not necessary to create a separate storage account for each VM.

For further question on pricing I suggest you reach out to our Azure Billing and Subscription team. It is free and they would be able to best to provide more insight and guidance on pricing topics.

Answer 4

If you are using azure managed disks then you are not required to store any disks in a storage account. a resource type called 'Disk' will be created in the same resource group you create the vm in to. however you will be asked to create a storage account to store vm diagnostic logs, etc. but that is not mandatory.

But if you create vm with disks that are in vhd format then a resource group is needed to store them. those will part of the blob storage in the storage account.
Microsoft recommends the new vms to be created with managed disks and provides option via portal as well as through power-shell, cli to convert disks from vhd format to managed disks.

Answer 5

Hi Deherman

yes you are true , the storage account has been created by default for diagnostic.

Many thanks