Drain the canned tomatoes, reserving the juice. Crush them with your hands or chop or dice.
Start a pot of 2 quarts of water and the pecorino chunk to boil. You might have to stir it occasionally to keep it from sticking. While it's coming to a boil, you'll start on the sauce.
Using a 12-inch skillet over medium heat, heat 1 tablespoon of the oil. When it begins to shimmer add the pancetta and cook until crispy about 5-7 minutes. Remove with a slotted spoon to a paper towel lined plate.
Add the garlic to the skillet and cook for about 1 to 2 minutes until golden. Add the pepper flakes and cook for about 30 seconds. Pour in the wine and increase the heat to medium-high. Cook until the most of the liquid has evaporated about 5-7 minutes. Add the drained tomatoes and cook for about 2 minutes, then stir in 3 tablespoons of the reserved tomato juice and turn off or remove from the heat.
You water should be boiling by now, so stir in the pasta and 2 teaspoons of salt. Cook until a couple of minutes shy of al dente, it will finish cooking in the sauce. Drain, reserving the pasta water and discarding the pecorino cheese.
Place the skillet back on medium-hight heat and add 1 ½ cups of the reserved pasta water. Bring it to a simmer and then add the pasta. Toss it, cooking it for 3-6 minutes or until most of the liquid has been absorbed.
Turn off the heat, stir in the remaining 2 tablespoons of olive oil, the pancetta and 2 teaspoons of black pepper. Serve with extra finely grated pecorino cheese.