When you deploy a Windows Server virtual machine (VM) in Microsoft Azure, the default size of the OS disk is 30 GB instead of 128 GB, as expected. This behavior occurs regardless of whether the disk is managed or unmanaged.
Microsoft Azure recently updated the initial size of a virtual hard disk (VHD) to 30 GB for all existing Windows Server images. This change was connected to the public release of Microsoft Azure Managed Disks. Before the release, the default OS disk size was 128 GB.
Microsoft Azure is planning to roll back this change in an update that is currently under deployment.
The price of Azure Managed Disks is based on the size of the disk. The minimum size is 32 GB. For managed disks, disk size is an important factor in the cost of running the VM.
For more information, see the following Azure article:
ID do Artigo: 4018933 - Última Revisão: 06/04/2017 - Revisão: 16