Greater than 50 ms – Serious I/O bottleneckĪvg.Between 20 - 50 ms - slow, needs attention.The following list shows ranges of possible values and what the ranges represent: Disk Sec/Read is the average time in seconds of a read of data from the disk. TheseĬounters determine the average latency of an I/O request.Īvg. These counters should be examined first and do not need any additional information to evaluate the drive performance. Disk sec/Read counters are considered “primary”. Logical Disk displays the mount point path instead of the physical NOTE: If you are using mount points we recommend that you use the Logical Disk object instead of the Physical Disk object. ![]() This is because the (_Total) instance sums and averages all of the disks together. Note that using the (_Total) instance can be misleading and mask problem areas. Disk counters that you can monitor to determine disk activity are divided into the following two groups:Įach disk should be monitored individually.
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