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Forum Discussion
Duo v2 will not boot after firmware upgrade
My ReadyNAS Duo v2 (RND2000-200NAS) was working fine prior to the most recent firmware upgrade (5.3.13). I was able to back up files via rsync from PC and laptop. I could browse media files on the ...
If there is no way to tell the firmware to ignore the button (somebody from NetGear will have to tell you if there is), you'll have to test the button itself to see if it's the button or something else in the circuit that's causing the problem..
Unfortunately, the backup button is soldered directly to the main board, not connectorized. If you take off the side panel of the NAS adjacent to the button, you will see four solder joints in a trapazoidal pattern at the top front. The two closest to the front of the unit are the electrical contacts. The other two just hold it in place. You can test the button there with an ohm meter. It's a normally closed switch. If the button works, then something else in the circuitry is the problem. If there is a lot of dust (and especially if there is residue from smoking), a good cleaning mght do the job. But other than that, without a schematic and with all the parts being small surface-mount ones, I would recommend you stop and say your NAS is done. Since the switch is normally closed, you can't disable it by jumpering it, either. You'll have to remove it or cut the really fine trace leading away from it. If you get to the point of wanting to remove the button and need some more help, just ask. I have a mostly disassembled DuoV2 I can use as a reference. If you choose to cut the trace, you are on your own, but it is obvious which one it is once you remove the board.
NOTE: I take no responsibility if your attempt to fix it makes things worse -- but really, how can it get worse than an unusable NAS?
Hi Sandshark,
Thank you for the detailed reply. I have had the unit open several times during this process, and I've pulled the entire mainboard (plus the SATA and RJ45/USB3/TTL daughterboards). So I'm comfortable working inside the chassis, but I've never worked with soldered-on parts before.
To be clear, my ReadyNAS Duo v2 is quite usable once I manually boot it. In other words, if I interrupt the normal bootup (the 3-second delay), or if I let the boot fail (because no USB drive is detected), then I'm dumped into the U-Boot prompt. I can then boot from the NAND by setting bootargs to "console=ttyS0,115200" and by using the "run bootargs_nand" command to utilize my "bootargs_nand" variable that I defined (listed in a previous comment on this thread).
The device will start up fine and function fine. It's just the damn reboot that is a problem. I suppose I could try to create a USB drive that contains the exact same code as the NAND, and just leave the USB drive in the front USB port all the time. However, I have never successfully had a full start-to-finish boot when using the USB drive... only recovery. It's the NAND boot that goes start-to-finish.
I mention all of this to make it clear that the device itself seems to be fine, but the "bootcmd" variable is always set to the USB boot on startup, probably because of this Backup button problem.
So I'd like to try some non-destructive tests to see if it's truly the button. The ohm meter test sounds feasible to me. However, I'm not really great at using ohm meters... as in, I'm not sure what level of sensitivity to use. I've used a meter to detect wall voltage before when installing my Nest thermostat, but this is different.
Could you explain specifically how I can test the button and its connections to determine where the failure is occurring?
I must say, these forums are amazing. The detailed help I'm getting here is leagues beyond the help that I received on the phone with NETGEAR customer support. They gave up on me by the third time I corresponded with them.
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