1. A method comprising; storing operating system instructions in a NAND based memory, the instructions executable by a processor, the instructions having a logical address to be utilized by the processor to fetch the operating system instructions; storing address conversions in the NAND based memory, the address conversions relating the logical address to a physical address of the operating system instructions in the NAND based memory, the address conversions having at least one validity flag; performing a direct read of the operating system instructions from the NAND based memory in response to a first setting of the at least one validity flag; and performing an indirect read of the operating system instructions by fetching an address conversion from the NAND based memory in response to a second setting of the at least one validity flag.