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Forum Discussion
ReadyNAS NV+ Won't power on after powering down
Model - ReadyNAS NV+ RND4210 (Note -original label on chassis says RND4000 V3 over which a sticker has been placed saying RND4210) Not sure of firmware version. Unit was shut down and disconnected whi...
Try removing the disks (labeling by slot). The units normally will power up in that state (and RAIDar will report "no disks").
If they don't power on, the most likely cause is the PSU. Though a failed system board could also present the same symptoms.
Thank you StephenB. I'll give that a try. Luckily, the arrays contain mostly redundant data and I have one NV+ left that is still working for the time being and I can use it to retrieve the data.
If the devices do power on without disks, can I simply start re-inserting the disks?
Did you also disconnect the NASes from power? Even when they are off, the 5V standby power is on, and that's used to command the NAS on. In my NVX that needed a new supply (same supply as NV+), it was the standby power that was at fault.
I don't think it's a good idea to insert the drives one by one unless you are willing to lose the data on them. You don't want it deciding that it needs to re-build the array when you have a known issue. Besides, just because you can insert them one at a time (spinning up independently) doesn't necessarily mean it has the necessary power to spin them up all at once, if the power supply is the issue.
You could put all drives in your other NAS though, to see that one of them is not the culpret. If the problem moves with the drives, you'll need to figure out which one it is. A USB dock and manufacturer's diagnostic software is the best first step there.
Since you have another NV+, you could swap the power supply from it to see if that's the issue. It sounds to me like it probably is, but that would save you buying a replacement supply only to find that's not the problem. There is a chance that, if something else within the NAS "took down" the supply, it could do the same to the other one, but it realy doesn't sound like that's the case here.
Sandshark wrote:
I don't think it's a good idea to insert the drives one by one unless you are willing to lose the data on them. You don't want it deciding that it needs to re-build the array when you have a known issue. Besides, just because you can insert them one at a time (spinning up independently) doesn't necessarily mean it has the necessary power to spin them up all at once, if the power supply is the issue.
I agree.
Sandshark wrote:
You could put all drives in your other NAS though, to see that one of them is not the culpret. If the problem moves with the drives, you'll need to figure out which one it is. A USB dock and manufacturer's diagnostic software is the best first step there.
Since you have another NV+, you could swap the power supply from it to see if that's the issue. It sounds to me like it probably is, but that would save you buying a replacement supply only to find that's not the problem. There is a chance that, if something else within the NAS "took down" the supply, it could do the same to the other one, but it realy doesn't sound like that's the case here.
These sound like good next steps.
I did not disconnect the NAS's from power. Both were connected to separate UPS's.
There won't be any inserting of disks one by one as the NV+ would not power on diskless. It looks like the power supply is the issue but for 2 of them to fail simultaneously in 2 separate units seems like seriously bad luck. All this because I was trying to be cautious about the building power out.
Is it possible a dead CMOS battery is at fault and replacement would fix the problem?
Anyway, I think the best way to deal with this is retire the NAS's. I'm going to put the drives from each of the failed units into the last working NV+ and try to transfer all the data. Hopefully, I had all of them on the same firmware. Otherwise, there will be a lot of swapping power supplies from unit to unit.
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