Yup, you're correct about the disk access. To help prevent bottlenecking the disk, or otherwise interfering with normal system performance, by default, we will stop a scan if something else is accessing the drive.
This is specifically controlled by the "throttling" settings:
Changing the sensitivity may be better that disabling it outright. That way, it will still stop, but only if there is a lot of activity (eg, setting it to "low sensitivity" )
As for the temperature equalization, this is designed to help preventing "hot zones" or "hot spots" in your case.
You can disable this option or increase the "window" if you want.
And yes, the default setting is "3C".
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