Same disc drive: Varying error handling performance?


#1

Hello.
The same disc drive sometimes manages to read the same sectors on a damaged disc, sometimes it does not five minutes later (next ejection).
It is a Pioneer DVR-107 from 2004.

Shouldn’t the reading performance always be the same? Do weather conditions (temperature/air pressure) matter?.


#2

It could also be that the drive is sometimes not receiving sufficient power and therefore the opu can’t focus properly on the disc?


#3

Power supply is always exactly (measured) 12.2 Volts.
0.2V should make no difference.