The Evolution of NVMe Storage StandardsFrom AHCI to NVMe: A Brief HistoryFor two decades, the storage industry accepted latency as natural. When AHCI appeared, it codified the assumptions of the mechanical age. Every command waited on spinning platters, so the...
Understanding the Role of DRAM in SSDsWhat DRAM Does in a Standard NVMe SSDTake a standard NVMe SSD and you will find a small DRAM chip beside the controller. That chip is not decorative. It holds the flash translation layer, a table that maps logical addresses to...
Understanding Command Queues in NVMeWhat Is a Command Queue?Every command a system sends to an NVMe drive waits in a command queue. It is a buffer where the host stacks read and write requests before the controller processes them. In NVMe, each queue pair has two...