I have been using 213j and am really happy with the choice.
However, I have one nagging issue which is irritating the heck out of me.
The system refuses to hibernate or do an auto shutdown and after I manually shutdown, it refuses to WOL.
I use WD red 2TB drives.
I went through the Synology forum and realised that there are many others in the same boat.
I removed the network cable (thinking there may be some client which is sending network packets to prevent hibernation), but it still doesnt hibernate.
I enabled hibernation logs, but then I dont get any, as it doesnt hibernate.
As this is the most active Synology thread, I thought I would get the best advise here. If you think its OT, I will move it.
Mine automatically goes into hibernation I think after 10 to 15 min of non-usage. I use a WD and a Seagate 3 TB drivers and WOL also works perfectly. But sometime last week I enabled some option related to the external access/cloud or something on similar lines and I read somewhere that this feature if on I think it keeps the NAS always on. I am yet to figure out how to disable it but my NAS now does not go to sleep even after many hours of non-usage. By the way I use DS214se version and pretty happy with its functions and reliability, firmware updates and torrent functionality.