High Disk Queue Length?

WolfyB

Distinguished
May 23, 2012
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Been having system wide lag problems recently and trying to find the cause. Noticed that whenever the lag happens the Disk Queue Length for my main C drive spikes very high, and even when there is no lag it is high but not as high as when its lagging. If anyone could provide me some insight into if this could be causing my problem I'd appreciate it.

The hard drive model is Western Digital WD1002FAEX.