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Max disk size limited to 1TB? RRS feed

  • Question

  • We do have our entire infrastructure on Azure, now we need a VM with a disk larger than 1TB but it looks like this is not possible. Could you please confirm?

    We need a single disk with > 1TB (I know you can attach more than a disk but this wouldn't work for us).

    Tuesday, May 12, 2015 12:54 PM

Answers

  • The 1 TB limitation (1023 GB) is only for OS disk. You cannot have a virtual machine with an OS disk greater than 1 TB. For data disks, it depends on the VM series and Size. Consider the number of disks with a maximum size of 1 TB per disk. You can then use stripping (Storage Spaces) to obtain greater volume sizes.

    Regards, Samir Farhat || Datacenter Consultant || The way to share my knowldge with the community https://buildwindows.wordpress.com


    Tuesday, May 12, 2015 2:34 PM

All replies

  • Hello pmonte,

    It is possible to utilize a VM with a disk larger than 1TB. At [1] you can find an extensive list of all VM instances currently offered by Microsoft Azure. For you the most relevant ones would be Extra Large, A7, A8, A9, A10 and A11.

    [1] https://msdn.microsoft.com/en-us/library/azure/dn197896.aspx?f=255&MSPPError=-2147217396

    Regards,
    Hristo Valev
    Developer-Hotline for MSDN Online Germany

    Disclaimer:
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    Tuesday, May 12, 2015 1:18 PM
  • Reading that page I understand that the max size is 1023 GB for A7 - A11 too, where do you read that it can be larger?
    Tuesday, May 12, 2015 1:22 PM
  • Hello pmonte,

    The instances I mentioned offer from 1.77TB up to 2TB of local storage (see [1]: Each local storage resource is reserved for every instance of that role. The minimum amount of disk space that you can allocate for a local storage resource is 1 MB. The maximum amount that you can allocate for any given local resource depends on the size of the virtual machine that is specified for the role. Each virtual machine size has a corresponding total storage allocation, and the total space allocated for all local storage resources declared for a role cannot exceed the maximum size allotted for that virtual machine size.). There is also a workaround for it for smaller instances, which involves creating a virtual hard drive from all added disks. You can find more information about this at [2].

    [1] https://msdn.microsoft.com/en-us/library/azure/ee758708.aspx
    [2] https://dteplyakov.wordpress.com/2014/10/27/azure-how-to-create-a-virtual-disk-larger-than-1tb/

    Regards,
    Hristo Valev
    Developer-Hotline for MSDN Online Germany

    Disclaimer:
    Please take into consideration, that further inquiries cannot or will be answered with delay.
    For further information please contact us per telephone through the MSDN-Entwickler-Hotline: http://www.msdn-online.de/Hotline
    MSDN-Entwickler-Hotline: Fast and professional help for software developers free of charge!

    For this post by the MSDN-Entwickler-Hotline the following terms and conditions apply: Trademarks, Privacy as well as the separate terms of use for the MSDN-Entwickler-Hotline.

    Tuesday, May 12, 2015 1:54 PM
  • The 1 TB limitation (1023 GB) is only for OS disk. You cannot have a virtual machine with an OS disk greater than 1 TB. For data disks, it depends on the VM series and Size. Consider the number of disks with a maximum size of 1 TB per disk. You can then use stripping (Storage Spaces) to obtain greater volume sizes.

    Regards, Samir Farhat || Datacenter Consultant || The way to share my knowldge with the community https://buildwindows.wordpress.com


    Tuesday, May 12, 2015 2:34 PM
  • Just a quick question. I was getting little confused regarding the numbers here. Why do Azure have 1TB=1023 GB, 2TB = 2047 GB and 4TB = 4095 GB. Why do we have that 1GB difference?

    Friday, August 9, 2019 7:04 PM