Physical Disk\Avg. Physical Disk\Avg. Disk secs/transfers
The Avg. Disk secs/transfer is the overall average of the response time for physical disk requests during the sampling interval. This includes both the time the request was serviced by the device and the time it spent waiting in the queue. If this climbs to over 15–25 disk I/Os per second per disk, then the poor disk response time should be investigated.
The Physical Disk(n)\Average Disk Queue Time/Transfer can be calculated by taking the Physical Disk(n)\Avg. Disk secs/Transfer and subtracting the Physical Disk(n)\Avg. Disk Service Time/Transfer. The Average Disk Queue Time/Transfer indicates the amount of time a request spent waiting in the disk queue for servicing. A high queue time ...
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