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Old 16 November 2016, 18:08   #11
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Join Date: Dec 2013
Location: Lake Havasu City, AZ
Posts: 502
The problem with the drive speed test is that it requires a full revolution between readings. You could have a stuck spindle (or stuck disk in the jacket) part way through the rotation causing the drive speed to slow down briefly, at which point the motor will greatly speed up and then back down. It could (and does) even out to make the driver speed look correct when in fact it is not. A power problem, especially when powering a 3.5" drive from the SCP directly, will definitely show up like this. You have to plug the SCP into a 500mA capable USB port in order to power a drive from it.
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