Have a look at other applications that may be interacting with scsrvc.exe file operations
We had a similar issue with performance when we were running another vendors Anti-virus product that was not able to do process exclusions. Once we upgraded and were able to apply process exclusions the performance increased. The issue was for every file operation performed on an application solidcore checks the file. A real time AV scan was then performed on the file (this could also trigger a solidcore check causing a loop). McAfee AV I belive has the default McAfee process exclusions configured by default but I would confirm that it is applied. Sysinternals procmon.exe is helpful in identifying applications with high disk usuage.
File a support ticket and provide me the SR. I will track it down for the issue faced by you.
i saw such a problem with application control in a POC.
Try to configure a exeption rule for the process under -> Solidcore 6.2.0:General > Exception Rules (Windows)