btrfs corruption AGAIN

So a quick update to this. I know it's been a year since my last post, but since this shows up in google now I may as well put a closing comment.

Since my last post, Volume failures have continued and i've pretty much just come to accept this to be a quirk of bad implementation on Netgear's part and that these devices are simply unreliable due to the well known failings of BTRFS as a file system in general everywhere else in the linux community. I really wish the devices used XFS, but alas; we're stuck with the poor design choices Netgear gave us - short of hacking and flashing them with something else.

In subsequent failures, i've not even bothered SSH'ing in to the devices, and used only factory provided tools (Exluding SSH which is still factory provided too btw) and used instead regular backup options as well as ReadyDR. - the file system still crashes. even at 90% which is a huge waste of otherwise perfectly usable free space.

Regular volume house keeping has always been in place, weekly scrubs, monthly defrags, etc.

Currently in the process of switching the disks over from Seagate Barracudas to WD Reds with X2 the capacity to hopefully mitigate the volume almost full self destruct issue that shouldn't exist in the first place (On any sane file system)

But if even this fails to help and i end up once again with a busted volume later down the line, my advise to the general populace at the moment would be "Don't use these devices for anything mission critical where you expect the free space to become limited. If you do, don't trust the RAID configurations and stick to single disk shares, as bugs in BTRFS regarding RAID will likely leave you with a busted volume 6 months down the line."
Until Netgear either fix the bugs in BTRFS (Unlikly) Or switch to a more mature and reliable Filesystem (Like XFS) these NAS drives are volatile at best.