Forum Discussion

Aspirant

Dec 03, 2015

ReadyNAS 104 froze now will not boot msg btrfs_merge_bio_hook+a0

Readynas 104 2*6TB Reds +2*4Tb Reds. this is from 4 * 4TB. Firmware 6.4.0 Machine completely locked up overnight I had recieved a message that it had completed a balance. no ping, no ssh acce...

Booting

MrTAZ

Star

Dec 25, 2015

Hi,

May be too late but did you do in techsupport mode :

btrfs check --init-extent-tree /dev/md127

Regards.

MrTAZ

Star

Dec 25, 2015

Before btrfs check you must :

mdadm -A --scan
mount /dev/md0 /mnt
mount -o bind /dev /mnt/dev
mount -o bind /dev/pts /mnt/dev/pts
mount -o bind /sys /mnt/sys
mount -o bind /proc /mnt/proc
chroot /mnt/
swapon /dev/md1
(if not installed) apt-get install -y screen
screen bash
(if you want ssh) service ssh start
(for recovery screen) screen -Dr

Davexyz2
Aspirant
Dec 26, 2015
Thanks It is never too late for info on how to deal with these units.

I took the disks out about 4 days ago and am in the process of recovering the data via alinux box and restoring over the network.

Then oly 3 hours ago another of my 104's ends up in the same situation. 4*4TB WD Red 3.5TB ree in the middle of a video iso being transferred it freezes with the message on the front panel "ward" soemthing or other. Will not repond to off button , network or ssh so pull ot power plug and yes you guessed it front panel comes up with

"btrfs_merge_bio_hook+a0"

These machines are a bit of a disaster zone al least for me. I am sure that Netgear stand by these units and it is the users/customers to blame fro putting to much data on the machine, using them too much, forcing the units to do two things at once etc etc. Oh I forgot having no backup!
- mdgm-ntgr
  NETGEAR Employee Retired
  Dec 27, 2015
  Which firmware is the other unit that ran into this running? Is it also 6.4.0?
  
  There is a 6.4.1 now and also 6.4.2 Beta 1.
  - Davexyz2
    Aspirant
    Dec 28, 2015
    firmware 6.4.1