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sectionSpinning Rust [e5f32c22]

Part of hard drives

  • Operating systems implement all sorts of spinning rust scheduling, since they can make a good guess about how long operations will take (compared to jobs)

    • SSTF - shortest seek time first, but vulnerable to starvation due to a stream of nearby jobs
    • SCAN - loops back and forth, enqueueing for the next scan
    • SPTF - Shortest access first
  • Disks can also merge IOs together