Problem with start readynas pro 6 on OS 6.10.9

Recently updated OS from 4.2.3 to 6.10.9. Everything was fine for a few days, but yesterday it refused to load. Writes on display “Booting 50% (29%, 30%, 31%) wrote. Several reboots and hours of waiting do not solve the problem.

I have completed all the points from the boot menu, except for resetting to factory settings. I can reset, all data is saved, but I would like to access the logs for understand the reason for such a freeze and avoid this error in the future.

From the actions - I installed the FLEX server, but it is unlikely to be the cause ...

At the moment, I have transferred NAS to service mode. I ask for help from the community so that someone can connect and look at the logs, and also help with this problem.