Safe message transfers on PCI-Express link from RAID controller to receiver-programmable window of partner RAID controller CPU memory

摘要: A fault-tolerant mass storage system includes two RAID controllers that communicate via a PCI-Express link. Each controller has bus bridge coupled to the link, cache memory caches user data for on disk drives controlled by controllers, and CPU. The CPU fetches executes program instructions from it. programs with window information defining of locations within memory, which is less than an entirety memory. receives link other if header packet containing indicates it destined translates address so as write safely but only nowhere else