I couldn't find anything in the search about this, so here goes.
We have a N4100 1TB RAID system. It's been working fine for over a year as we do backups to it from our servers. Yesterday, it accidentally got powered off without being shut down properly first.
When we switched it back on, all the drive lights were flashing, and it said something about rebuilding the RAID.
All our backups had gone. Over 500GB of data, wiped out in a flash.
I'm not impressed. If it's going to lose all our backups if we have a power cut, then it's as much use as a chocolate fireguard.
Has anyone had a similar problem? I've upgraded the firmware in case this was a problem in an earlier firmware version and now fixed, but really I feel we can never trust this device again.