Corrupted /dev/md0 in OS6.10.2 ReadyNAS Ultra 6 starts in safe mode

Hi jrover ,

I was able to salvage my all my important files

I was wondering if you have managed to fix or  just factory reset with drives ?

we have pretty much same issue

"but my md0 appears there no space left

"devid 1 size 4.00GiB used 4.00GiB path /dev/md0"<--- this could be the culprit

# btrfs fi show
Label: '37c0ff7c:data' uuid: 46720122-f338-4fb1-a173-3f41ba608888
Total devices 1 FS bytes used 956.71GiB
devid 1 size 5.44TiB used 960.02GiB path /dev/md127

Label: '37c0ff7c:root' uuid: 5d670f7a-6a1c-42fc-9aae-cc277484869b
Total devices 1 FS bytes used 2.84GiB
devid 1 size 4.00GiB used 4.00GiB path /dev/md0

# btrfs check /dev/md0
Checking filesystem on /dev/md0
UUID: 5d670f7a-6a1c-42fc-9aae-cc277484869b
checking extents
bad block 29491200
Errors found in extent allocation tree or chunk allocation
checking free space cache
checking fs roots
root 5 root dir 256 not found
found 3047538688 bytes used err is 1
total csum bytes: 0
total tree bytes: 802816
total fs tree bytes: 16384
total extent tree bytes: 737280
btree space waste bytes: 270638
file data blocks allocated: 0
referenced 0