In some examples, a computing device includes a non-volatile memory, a volatile memory to store a page that is also stored in the non-volatile memory. As part of a hibernation process of the computing device, it is determined whether the page is sourced from a first type of non-volatile memory or a second type of non-volatile memory different from the first type of non-volatile memory. In response to determining that the page is sourced from the first type of non-volatile memory, cause storage of the page to the non-volatile memory, and in response to determining that the page is sourced from the second type of non-volatile memory, decline to store the page to the non-volatile memory.