Testing Considerations

The counters used for single disks can also be used on disk sets. However, two issues are of particular concern for disk sets:

Use the new disk counters. Avg. Disk Queue Length, Avg. Disk Read Queue Length, and Avg. Disk Write Queue Length display disk activity as a decimal, not a percentage, so that it can display values over 1.0 (100%). Then, remember to recalculate the values over the whole disk configuration. For more information, see "New Disk Activity Counters" earlier in this chapter.


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