Methods and apparatus for using memory

A method, comprising:

• employing memory stacking and memory mirroring in a total memory to reduce a number of memory entries that are written to an input/output (I/O) device while a portion of the total memory is replaced;
• and
• storing data in the total memory;
• wherein the total memory includes a first plurality of memories coupled to respective memory ports in a first group of memory ports of a memory controller and a second plurality of memories coupled to respective memory ports in a second group of memory ports of the memory controller.

A method, comprising:

• storing data in a total memory;
• employing memory stacking and memory mirroring in the total memory;
• and
• reducing a number of memory entries that are written to an input/output (I/O) device while a portion of the total memory is replaced;
• wherein the total memory includes a first plurality of memories coupled to respective ports in a first group of memory ports of a memory controller and a second plurality of memories coupled to respective memory ports in a second group of memory ports of the memory controller.

An apparatus, comprising:

• a processor;
• an input/output (I/O) device;
• a memory controller, coupled to the processor and I/O device, including a first and second group of memory ports;
• and
• a total memory coupled to the memory controller, wherein the total memory include a first plurality of memories coupled to respective memory ports in the first group and a second plurality of memories coupled to respective memory ports in the second group;
• wherein the apparatus is adapted to:
• employ memory stacking and memory interleaving in the total memory to reduce a number of memory entries that are written to the input/output (I/O) device while a portion of the total memory is replaced;
• and
• store data in the total memory.