Architects' Tech Alliance
Oct 27, 2019 · Fundamentals
How the Host Reads Data from an NVMe SSD: An Eight‑Step Read I/O Process
This article explains in detail how a host reads data from an NVMe SSD, breaking down the read I/O operation into eight steps that involve PCIe transaction layers, submission and completion queues, doorbell registers, PRP address handling, DMA transfers, and interrupt notifications.
NVMePCIeRead I/O
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