[BUG] VM is always being created with default OS disk size of128 and not with the specified OS disk size through SDK

[Anjali-nair01]

Library name and version

Azure.ResourceManager.Compute 1.2.0

Describe the bug

Unable to create an azure virtual machine with a specified OS disk size or update the OS disk size to a specific value using the SDK. The code we use is as per the samples provided in the repo, but it does not work. The virtual machine is always created with the default OS disk size of 128. We are not able to create a VM with an OS disk size greater than 128 GB using the SDK and we are also not able to update the OS disk size to greater than 128 GB using the SDK.
The code we use for create is

VirtualMachineData virtualMachineData = new(task.VirtualMachine.Location)
{
NetworkProfile = new VirtualMachineNetworkProfile()
{
},
HardwareProfile = new VirtualMachineHardwareProfile()
{
VmSize = new VirtualMachineSizeType(task.VirtualMachine.Sku),
},
StorageProfile = new VirtualMachineStorageProfile()
{
OSDisk = new(DiskCreateOptionType.FromImage)
{
DiskSizeGB = 256
}
}
};

            azureVm = (await vms.CreateOrUpdateAsync(WaitUntil.Completed, task.VirtualMachine.ComputerName, virtualMachineData, cancellationToken)).Value;

Similar behavior for update.

The data disk size also does not update using the SDK.

Expected behavior

The virtual machine at the time of create, should be created with the OS disk size we specify using the SDK, Also when we update the virtual machine, if we specify the OS disk size, it should update to the specified size.

Actual behavior

The OS disk size of the VM does not create with a specified value using the SDK and also it cannot be updated to a specific value using the SDK

Reproduction Steps

Similar code can be used

VirtualMachineData virtualMachineData = new(task.VirtualMachine.Location)
{
NetworkProfile = new VirtualMachineNetworkProfile()
{
},
HardwareProfile = new VirtualMachineHardwareProfile()
{
VmSize = new VirtualMachineSizeType(task.VirtualMachine.Sku),
},
StorageProfile = new VirtualMachineStorageProfile()
{
OSDisk = new(DiskCreateOptionType.FromImage)
{
DiskSizeGB = 256
}
}
};

            azureVm = (await vms.CreateOrUpdateAsync(WaitUntil.Completed, task.VirtualMachine.ComputerName, virtualMachineData, cancellationToken)).Value;

There are no errors at creation, The VM creates but the disk size always remains at 128.

Environment

No response

[jsquire]

Thank you for your feedback. Tagging and routing to the team member best able to assist.