At first step it is not possible to detect the scratch on the interlayers even though the scratch on the upper plate cannot be detected for the disk which falls to the ground. It is not possible to look the plates one by one by removing. Thanks to endoscopic monitoring device it is possible to determine interlayer scratch before head removal trial. By doing this time, equipment and effort are saved. This video is captured in laboratory and while capturing gloves, mask and clean bench environment are taken as basis. All rights reserved to Veri Kurtarma Hizmetleri Ltd. Şti. Cannot be copied or used without legal permission.