Memory operation upon failure of one of two paired memory devices

摘要

A method and apparatus for continued operation of a memory module, including a first and second memory device, when one of memory devices has failed. The method includes receiving a write operation request to write a data word, having first and second sections, by a first memory module. The memory module may have a first memory device and a second memory device, for respectively storing the first and second sections of the data word. A determination if one of the first and second memory devices is inoperable is made. If one of the first and second memory devices is inoperable, a write operation is performed by writing the first and second sections of the data word to the operable one of the first and second memory devices.

主权项

1. A method comprising:
receiving a request to write a data word to a first memory module, the data word having first and second sections, the first memory module having a first memory device to store the first section of the data word and a second memory device to store the second section of the data word; determining whether one of the first and second memory devices is inoperable; determining whether one memory device of a second memory module, having third and forth memory devices, is inoperable; and performing the requested write operation if one of the first and second memory devices is inoperable and one of the third and fourth memory devices is inoperable by writing the first section of the data word to the operable memory device of the first memory module and the second section of the data word to the operable memory device of the second memory module.