For system, network and cloud administrators
In order to check the size of the managed disk in Azure, type:
az disk show --resource-group yourresourcegroup --name yourdiskname --query diskSizeGb
In order to view current disk performance SKU in Azure, type:
az disk show --resource-group yourresourcegroup --name yourdiskname --query sku
In order to view all properties of a managed disk in Azure type:
az disk show --resource-group yourresourcegroup --name yourdiskname