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Explore the 18-year evolution of Shingled Magnetic Recording (SMR) technology in this comprehensive conference talk that examines physical layouts, filesystems, garbage collection algorithms, device drivers, and simulators. Discover how SMR disks have integrated with data storage solutions including RAID and deduplication systems, with real-world deployment examples from hyperscalers. Learn about the intersection of SMR and Heat-Assisted Magnetic Recording (HAMR) technologies in AI workload contexts and their potential to create new possibilities for hard disk drives. Compare the original promises of SMR technology from 18 years ago with current realities, understand key lessons from SMR research and deployment, and gain insights into future disk technologies, particularly HAMR disks. The presentation covers practical applications, technical challenges, and emerging opportunities in HDD areal density advancement for modern data storage environments.
