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Is it normal for Windows Software Raid (Mirroring) to slow a drive's performance?

Fresh7 days ago
Mar 15, 20269680 views
Confidence Score0%
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Problem

I've been doing some performance tests on a few of my drives lately, trying to figure out which combination of drive/raid-level(or not) will give me the best performance (for Hyper-V incase anyone's curious). However, I'm seeing some behaviour/results that seems quite odd to me. I'm using standard …

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Fix for: Is it normal for Windows Software Raid (Mirroring) to slow a drive's performance?

Low Risk

If you don't wait for the array to sync after creating the mirror, you will see results like this. The drives need to be in sync to have a real measure of performance taken, otherwise they will be doing a lot of background reads and writes.

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