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What does 'Highest active time' for disk activity in Windows resource monitor mean?
Fresh5 days ago
Mar 15, 2026111098 viewsConfidence Score0%
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Problem
I know what the disk io, disk queue length and other measures are, but what does 'Highest active time' mean? Is it the amount of time it is busy handling requests, or something else? When it is high, does it mean the CPU is busy doing some IO work, or is it just indicating that the disk is busy han…
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Fix for: What does 'Highest active time' for disk activity in Windows resource monitor mean?
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I’m pretty sure it is the same as the Perfmon counter "PhysicalDisk _Total %time". (It tracks this counter in lock-step.) Perfmon gives this description of that counter: % Disk Time is the percentage of elapsed time that the selected disk drive was …
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