I know that it is not possible to do PMS 100% quiet and I understand that sometimes he has to do something.
But the standby test on NAS has 30 cycles. 1 cycle means that it waits 5 minutes, checks if the NAS is in standby mode, and if not, writes what woke it up or prevented it from falling asleep. This is repeated 30 times, which means that the test lasts 2 hours and 30 minutes. I tried to run the test repeatedly, and out of 30 stand-by mode control cycles, it was recorded that the PMS was doing something in an average of 21 of them.
If you calculate it in minutes, out of 150 minutes, the NAS was woken up for a total of 105 minutes only because of PMS without any other reason.
It’s 70 percent.
If I convert it to a 24-hour day, then for almost 17 hours out of the day, the NAS will run cleanly only because of PMS activity, which was not triggered by any user.
If I recalculate it to 5-minute cycles, it comes out to 1440 cycles per day, of which 1008 cycles will be disrupted due to PMS.
If even 10 percent of these cycles do not follow each other, so the NAS goes into standby mode and then wakes up, it means that my hard drives stop 100 times a day and start up again 100 times a day.
That means 3000 stops and restarts per month, so I’m afraid that it will have destructive consequences on my hard drives.
I can set the transition to stand-by mode for a longer time (the next option is 10 min), however, the NAS will then almost never go to stand-by mode, which means that the disks will spin 24 hours every day, which is also for them it probably won’t be ideal, not to mention the electricity consumption.
It would probably be possible to turn off PMS when I don’t need it, but this option is very inconvenient, because before I want to watch a movie on my TV, I would first have to start PMS through another device, wait until it starts, watch what I want and then PMS is turned off again through another device.
After that, the question arises as to whether it’s worth using pelx at all, because I find it easier to record a movie on an external disk and connect that disk to the TV. But I wanted to avoid this whole process by buying a NAS and installing PMS. It also struck me as a nice possibility to share movies with my family in the future without having to physically give them an external hard drive. they could connect to my PMS and watch comfortably, but they would lose this option if I always had to turn on PMS before they wanted to watch something.
maybe I’ll try to let everything run for a few days and see if it doesn’t stop, because at the moment I made it so that the NAS automatically turns off at a certain hour and turns on at a certain hour (since I work from morning to afternoon, so I don’t need to use the NAS). In the future, I would like NAS to be always on, but most of the day it is in standby mode, because if I am not at home and would like to upload something to the NAS (for example, back up my phone), no one will be able to physically turn on the NAS for me and I would have to wait for a certain hour , which is also quite impractical and unconfortable.
I was hoping that I’m just doing something wrong in the settings or something and someone here will advise me that something needs to be turned off somewhere and it will be OK 
BTW everything what was possible to disable in Scheduled Tasks is already disabled 