| 摘要 |
A memory system includes a memory controller, one or more memory channel(s), and a memory subsystem having a memory interface device (e.g. a hub or buffer device) located on a memory subsystem (e.g. a DIMM) coupled to the memory channel to communicate with the memory device(s) array. This buffered DIMM is provided with one or more spare chips on the DIMM, wherein the data bits sourced from the spare chips are connected to the memory hub device and the bus to the DIMM includes only those data bits used for normal operation. The buffered DIMM with one or more spare chips on the DIMM has the spare memory shared among all the ranks, and the memory hub device includes separate control bus(es) for the spare memory device to allow the spare memory device(s) to be utilized to replace one or more failing bits and/or devices within any rank of memory in the memory subsystem.
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