I brought 2 Qnap TVS-872xt in april for around £7,000 and 1 system randomly keeps rebooting for the last week or so,
each system has the following
3x HGST 12tb HUH721212ALE600
2x SSD 970 EVO Plus 500GB for cache
using 10gb connection.
Current firmware version: 4.4.0.0979
im currenlty using 10.4tb of 21.8tb
it will randomly reboot(stating system was not shut down properly) as much as 10 times a day and state file pool is not clean, suggest go to file storage.. i have done this several times but issue persists.
i brought the system from SPAN.co.uk and they cut me off twice after getting though to the tech team

i dont know what the issues is, i have taken out the hard drive and started the system and runs for a while and reboots.
this has only started happening since the last firmware update.
cheers