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Forum Discussion

Nasgul's avatar
Nasgul
Aspirant
Apr 18, 2016

Error: btrfs_merge_bio_hook+a0 #26746663

I have a issue with my RN104 running OS 6.4.2.  It appeared to be working fine on Thursday night.  Friday morning the unit was inaccessible.  The display panel shows btrfs_merge_bio_hook+a0.  The uni...
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BrianL2's avatar
BrianL2
NETGEAR Employee Retired
Apr 18, 2016

Hi Nasgul,

 

Welcome to the community!

 

Do you have a backup of your data? If yes, try to perform USB boot recovery and use the image or firmware for 6.4.1 /or 6.4.2. If not, access the boot menu and set it to read-only mode (volume).

 

These steps should be done with all the drives installed in your system.

 

 

Kind regards,

 

BrianL
NETGEAR Community Team

  • Nasgul's avatar
    Nasgul
    Aspirant
    Apr 18, 2016

    Hi Brian - I don't have a backup, I have about 12TB of data stored, that's hard to backup with out having a 2nd NAS.  I had hoped that a RAID system would be sufficient. 

     

    You're the second support person to suggest a USB boot recovery, but the firmware seems intact as the unit boots correct with different drives and even removing one of the four drives in the array set the unit boots, it just doesn't recognize the drives as being members of a valid array.  Although admittedly I don't know how the NetGear NAS functions, so I could easily be incorrect and the USB boot recovery would help.  However, Ken the person who has been responding to e-mail agreed that a USB Boot Recovery would probably not be helpful.

     

    I did try to boot into Read Only mode, that didn't work, I get the same error.

     

     

    • BrianL2's avatar
      BrianL2
      NETGEAR Employee Retired
      Apr 19, 2016

      Hi Nasgul,

       

      Could you share with us the ticket # you got from NETGEAR support? If you will go back to Boot Menu and select Telnet (techsupport) mode, will it push through?

       

       

      Kind regards,

       

      BrianL
      NETGEAR Community Team

      • Nasgul's avatar
        Nasgul
        Aspirant
        Apr 19, 2016

        HI Brian

         

        The ticket number is #26746663.  The unit does boot into Tech Support mode, the front panel says DEBUGMODE[58220] and the Unit's IP address.

         

        The unit also appears in RAIDar with it's status listed as Tech Support Mode and the Debug Code 58220.

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