1002030001 - Commit failed when making or checking permissions after firmware 6.7.5 update

Finally got all the data off and decided to try the repair method. Here's what I did:

1. Started SSH as you described:

http://NAS_IP/dbbroker?start_svc=ssh
- Successfully started ssh

2. Restart NAS in Tech Support Mode
3. Used PuTTY to connect:
- port 23
- telnet mode (not ssh)
- IP

- login using [redacted]

4. Started issuing commands:

btrfs check --repair /dev/md127
  enabling repair mode
  checksum verify failed on 20187450474496 found AB26D242 wanted 00000000
  checksum verify failed on 20187450474496 found AB26D242 wanted 00000000
  checksum verify failed on 20187450474496 found AB26D242 wanted 00000000
  checksum verify failed on 20187450474496 found AB26D242 wanted 00000000
  bytenr mismatch, want=20187450474496, have=0
  Couldn't read tree root
  Couldn't open file system

btrfs check --fix-crc /dev/md127
  Fixing bad CRC
  checksum verify failed on 20187450474496 found AB26D242 wanted 00000000
  >> Fixed
  checksum verify failed on 20187450474496 found AB26D242 wanted 00000000
  >> Fixed
  bytenr mismatch, want=20187450474496, have=0
  Couldn't read tree root
  Couldn't open file system

btrfs check --repair /dev/md127 
  enabling repair mode 
  bytenr mismatch, want=20187450474496, have=0 
  Couldn't read tree root
  Couldn't open file system 

From there I have no idea what to do, and the internet is only providing so much. Pretty sure this is a lost cause now, so I'm going to make sure my recovered data is backed up and then start fresh in the morning with a factory reset. 

Michael