MEMORY MIRRORING

摘要

Memory system enabling memory mirroring in single write operations for the primary and backup data storage. The memory system utilizes a memory channel including one or more latency groups, with each latency group encompassing a number of memory modules that have the same signal timing to the controller. A primary copy and a backup copy of a data element can be written to two memory modules in the same latency group of the channel and in a single write operation. The buses of the channel may have the same trace length to each of the memory modules within a latency group.

主权项

1. A system comprising:
a memory controller configured to transmit memory data to dual-inline memory modules (DIMMs) using two or more communication channels; a first communication channel coupled to said memory controller comprising a first bus; a first set of DIMMs coupled to said first bus; a second communication channel coupled to said memory controller, wherein the second communication channel comprises second and third buses; a second set of DIMMs coupled to said second bus; and a third set of DIMMs coupled to said third bus, wherein said memory controller is configured to enable storage of a primary copy of data within said second set of DIMMs coupled to said second bus and a secondary copy of data within said third set of DIMMs coupled to said third bus by transmitting a single copy of the data over the second communication channel.