We've had this old plant around for quite some time. It's been at least seven years since it survived our big garage fire seven years ago when it was literally seared to a crisp on one side. Most would have given up on it. But here it is, growing strong and healthy. It helps that Aloe erinacea is such a nice plant no matter what.
This is now considered by some to be a white-spined form of Aloe melanacantha. It's very slow growing, remaining pretty much the same size for a long time. It sometimes goes by the common name "Hedgehog Aloe."