Brendan Gregg

MAY 8, 2021

It seemed to have several set speeds, and when pushing hard it would try a faster speed for a couple of seconds, then a faster one, until it found the fastest it could operate (presumably it tries faster speeds until it begins to get sector-ECC errors). avg-cpu: %user %nice %system %iowait %steal %idle 7.90 Linux 4.15.0-66-generic

Performance 133

Performance Latency Speed Systems 133

Brendan Gregg

MAY 8, 2021

It seemed to have several set speeds, and when pushing hard it would try a faster speed for a couple of seconds, then a faster one, until it found the fastest it could operate (presumably it tries faster speeds until it begins to get sector-ECC errors). avg-cpu: %user %nice %system %iowait %steal %idle 7.90

Performance 40

Performance Latency Speed Systems 40

Brendan Gregg

MAY 8, 2021

It seemed to have several set speeds, and when pushing hard it would try a faster speed for a couple of seconds, then a faster one, until it found the fastest it could operate (presumably it tries faster speeds until it begins to get sector-ECC errors). avg-cpu: %user %nice %system %iowait %steal %idle 7.90 Linux 4.15.0-66-generic

Performance 40

Performance Latency Speed Systems 40