Azure managed disk pricing: based on provisioned disk size or used disk size?

Question

Hi All,

I want to create and attach a data disk of custom size 400 GB (premium SSD) to one of my VM.

How the pricing will be calculated? provisioned size (400 GB) or for the size of next available disk type (512 GB)

My Understanding: For managed disk pricing will be based on the provisioned size of the disk, along with few other parameters.

Provisioned size = 400 GB Premium SSD

Pricing tier is P20

P20: 512 GiB, 2,300 Provisioned IOPS, 150 Provisioned MB/s, $73.220/month (East US location)

Based on above disk type details, 512 GB premium SSD cost is $73.220/month.

So, for 1 GB/month, the cost will be $73.220/512 ~ $0.143

Therefore, for 400 GB/month, the cost will be 400 * $0.143 ~ $57.2

Is my understanding correct? or for 400 GB disk we will be billed for 512 GB disk cost.

Answer 1

Hi @Lini Mariam Mathew ,

in your example with 400 GB disk size:

For Premium SSD (v1) you will be charged for the next available size which is 512 GB.

For Premium SSD v2 you will be charged for the provisioned size, which is 400 GB.

The advantage of Premium SSD v2 is you can justify the IOPS without increasing the disk size.

Please take a look here: Managed Disks pricing

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(If the reply was helpful please don't forget to upvote and/or accept as answer, thank you)

Regards

Andreas Baumgarten

Answer 2

Hi @Lini Mariam Mathew ,

for Premium SSD (v1) the price depends on the size, but not flexibel sizes. Means the price depends on the size of the disk based on the fixed sizes, for instance 4 GB, 8 GB, 16 GB, 32 GB, 64 GB, 128 GB, .....

You can create a 80 GB Premium SSD but you will pay for 128 GB Premium SSD (v1), which is the next size available and the 64 GB size disk is to small for 80 GB disk.

Source: If I create a standard managed disk from an existing VHD that's 80 GiB, how much will that cost me?

With Premium SSD v2 it's different. The price depends on the deployed size, for instance 80 GB and the IOPS can be increased if required for extra charge.

Source: Premium SSD v2 and Managed Disks pricing

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(If the reply was helpful please don't forget to upvote and/or accept as answer, thank you)

Regards

Andreas Baumgarten

Answer 3

Hello Lini Mariam Mathew,

Greetings! Welcome to Microsoft Q&A Platform.

Based on your above question,

1.Can you also confirm on how to change the disk type to Premium SSD V1 to Premium SSD V2 of an existing disk via portal.

There are five disk types of Azure managed disks: Azure Ultra Disks, Premium SSD v2, premium SSD, Standard SSD, and Standard HDD. You can easily switch between Premium SSD, Standard SSD, and Standard HDD based on your performance needs. Premium SSD and Standard SSD are also available with Zone-redundant storage. For most cases, you can't yet switch from or to an Ultra Disk or a Premium SSD v2, you must deploy a new one with a snapshot of an existing disk. However, as a preview, you can switch from existing disks to a Premium SSD v2. See Convert Premium SSD v2 disks (preview) for details.

How do I calculate pricing for Premium SSD v2 Disk Storage? The total cost of Premium SSD v2 Disk Storage depends on the size and number of disks you provision, and their respective configurations in terms of provisioned IOPS and throughput.

For example, if you have an application that requires three different disks with the following characteristics:

Disk 1 - 64 GiBs, 2,000 IOPS and 120 MB/s of throughput Disk 2 - 256 GiBs, 4,000 IOPS and 100 MB/s of throughput Disk 3 - 1,024 GiBs, 15,000 IOPS and 1,200 MB/s of throughput The monthly cost for each Premium SSD v2 Disk, in a Locally Redundant Storage (LRS) configuration, in the East US region will be:

Disk 1 monthly cost = 64*$0.081 = $5.14/month Disk 2 monthly cost = 256*$0.081 + (4,000-3,000) * $0.0052 = $25.67/month Disk 3 monthly cost = 1,024*$0.081 + (15,000-3,000) * $0.0052 + (1,200 – 125) * $0.041 = $186.71/month Prices are subject to change depending on the region you choose.

Additional information: If I use Azure Storage for only a few days a month, is the cost prorated?

Storage capacity is billed in units of the average daily amount of data stored, in gigabytes (GB), over a monthly period. For example, if you consistently used 10 GB of storage for the first half of the month, and none for the second half of the month, you would be billed for your average usage of 5 GB of storage.

Additional information:

Pricing calculator: Calculate your estimated hourly or monthly costs for using Azure. The Azure Pricing Calculator can help you understand the costs of moving workloads to the Azure cloud. It estimates Azure pricing once all your data and applications are in Azure.

Managed Disks pricing: https://azure.microsoft.com/en-us/pricing/details/managed-disks/

Please let us know if you have any further queries. I’m happy to assist you further.   

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