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RN20400 died, not responsive. #27304635
Today my RN20400 (OS 6.05.01) was unresponsive. It was reporting the error "btrfs_merge_bio_hook+a0" on the display, and the blue power button was flashing.
I powered the unit off for 30 secon...
Hello Brian,
I did finally get a chance to try out the unit. My disks were transfered over, but upon bootup, It halted with the error "btrfs_merge_bio_hook+a0".
At this point I powered the unit off, and pulled all of the drives, except the 2TB disk that's in poisition 1, and powered it on again. It was able to boot, and load the ReadyNAS OS. When in the GUI, the disk in position 1 was RED, and it said that I needed to remove the existing data to create a new volume (maybe partition, I can't remember the nomenclature). Figuring that it just needed to see the rest of the disks, I place the remainder of the disks in their respective slots. They all came up red, so I just decided to remove the partitions, and start over.
When I finished with removing the partitions, I tried to make a new volume arcross all 4 disks, but it would not let me choose XRAID for the volume, and only the traditional RAIDs. I rebooted the RN20400, and it still only show the traditional RAIDs as a volume option. I then selected the factory default option from the GUI, and started over from scratch.
It took about 2 days for the disks to resync, and I copied my data back over to it. I hope this unit is more stable than my old one, I have never had a RAID that was so unreliable.
Can you try booting to volume read-only mode (a boot menu option)?
Sorry, I forgot to mention that I did try getting into the boot menu (http://kb.netgear.com/app/answers/detail/a_id/22891), but it never would come up. I also tried the USB recovery (http://kb.netgear.com/app/answers/detail/a_id/29952), and it wouldn't come up either.
The RN20400 always displays the white boxes on the top line of the LCD, blank on the bottom line, and blue power light flashes.
Did you try the email support option at my.netgear.com?
I don't get that as an option, presumably, because I am outside of my "complimentary" support contract.
It would be helpful if Netgear would plainly post it's support contact information, instead of actively trying to obscure it.
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