We are seeing SegmentNotFound error in our logs. I found this article on how to fix it but this article applies to AEM 6.0|1|2. We are working on AEM 6.3 and when trying to execute command "java -Xmx6000m -jar oak-run-*.jar check -d1 -p /path/to/crx-quickstart/repository/segmentstore" it says "1 is not a recognized option".