make premium disks available for N class (with gpu) VMs
N class machines (with gpu) dont support premium disks.
Disk IO is significantly slower than aws equivalent VMs (p2)
David Berg [msft] commented
Already available for NC v2 and v3 (and others). They support Premium disks (see https://docs.microsoft.com/en-us/azure/virtual-machines/windows/sizes-gpu#ncv2-series).