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ReadyNAS RN214 check root fs - booting 47% - stalled
round
I have a RN214 runninfg V6.10.2 (downgraded from V6.10.3 a month or 2 ago).
I had to unplug the unit after it became un-responsive (again) but this time, instead of rebooting normally, it displayed the message "check rootfs" followed by "Booting" with indicate an increasing percentage that stalled at 47%. The unit does not respond to ping, disk activity light is off, power button is fllashing and unresponsive.
From other similar experience on this board, it looks like the 4Gig main partition is corrupted and that someone needs to go in the unit while in tech support mode to restore/fix the main partition.
I would like to retain the data currently in the /data partition if at all possible.
Background; for the last while, the unit has been frequentlty become unresponsive (cannot ping, cannot connect, does not respond to ping, disk activity light is off, power button is fllashing and unresponsive.
Login via ssh and using journalctl, the unit comes unresponsive after a few messages like "btrfs_transaction invoked oom-killer". When that happens, the 2 processes using the most memory by far are two readynasd processes.
The last time it went unresponsive, I was running a btrfs balance from the web interface as I added a third and eventually a 4th drives much later than the first 2. Before the balanced, I had used snapper to remove a lot of daily snapshot as there was indications in the community that this might have caused the oom problems that I was seeing.
I have fairly recent logs downloaded via the web interface and I has a ssh window opened to the NAS and running journalctl showing what was happening on the NAS at the time it went unresponsive.
What can I do to get this working again and (hopefully) access the /data partition?
Thanks
If the NAS is used, then Netgear won't provide paid support. readynasd is the Netgear NAS application itself.
Have you tried booting up the NAS read-only? Probably worth doing before you try going into tech support mode.
Though if this isn't critical, I'd suggest just doing a factory default and rebuilding the NAS.
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The btrfs errors cause me to suspect the /data filesystem is corrupted (though it does sound like root is messed up also).
Do you have a backup of the data?
I have found readynasd to be very problematic when it is having difficulty accessing the volume, be that during a sync, scrub, or because of a problem with the volume as you seem to be experiencing. It will ultimately reach 100% CPU usage and lock up the NAS. This behavior has been reported to Netgear via the forum multiple times, and mostly ignored. When not completely ignored, they say they can't re-produce it.
My speculation is that it just keeps stacking up failed drive access attempts until it runs out of space and/or throughput. It has no "escape clause" that would at least exit and report the problem.
Of course, even reporting a problem would likely not solve your issue; though it may give you more clues as to how to solve it.
I agree with your assessemnt that somebody likely needs to go in in support mode and try to fix it. Are you looking for instructions on how to do that yourself or how to get support from Netgear?
SandsharkI am looking preferably for instructions on how to repair/replace the main filesystem so I can fix it myself if it ever happens again.
I bought that NAS used so I have no formal support. I would have to check how much Netgear charges for looking into this and fixing it (assuming they charge only if the repair of the main filesystem is sucessful)...
I have seen posts from members of this community fixing similar problems so that is an option too...
What is the purpose of readynasd? Is there supposed to be more than 1 active at any given time?
Thanks
StephenBThis now failing NAS is use to backup 3 other NAS that I own. I am exploiting btrfs snapshots to keep multiple versions of files that changed on the 3 other NAS.
There is a few files that I'd really like to get to on the /data partition but, assuing the none of the other 3 NAS dies on me, I have no critical data on the failing NAS that I cannot recreate.
Should I have seen warnings about the btrfs errors? Was there a way to check the health of the btrfs /data partition before it died on me?
Thanks.
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