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btrfs search forward +2d4 error on RN204
For few weeks I get an "btrfs search forward +2d4" error in my RN204 status window and after that the NAS is inaccesable by network PC's and no longer responsive even does not react to pushing power button. If I get this error I can only power-off the NAS by removing the powercord. When I plug in the NAS again it reboots without any error messages and I can access NAS volume on my networked PCs but after a while the error "btrfs search forward +2d4" returns. This error appeared for the first time about a month ago and since then I have tried several things to get rid of this error. Amongst others I performed manual maintenance (scrub, defrag, balance) and these tasks all seemed to run without any erors.However the error keeps comming back (quite frequently now in fact). Disk status seems OK (Reports Heathy) and there is stil sufficient free space on the NAS.
NAS RN204 details:
Firmware v6.6.0
Disk status seems OK (Reports Heathy) on all 4 WD 6TB drives (WD60EFRX)
There is stil sufficient free space (9.5Tb free) on the NAS.
The error showed up after recent update of the firmware and the error message coincided with some of my files all of a sudden becomming read-only (again something I seem unable to repair/change). Yesterday all of a sudden I seem to have lost several directories on my NAS as they are no longer visible, but there is no indication of these actually no longer being on the drives as the ammount of free space did not change.
Is my NAS defective? Or are disks defective?
I cannot find anything on internet on how to solve this error or how to proceed.
Can anyone please help me to solve this issue?
Hans
11 Replies
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Can you send in your logs (see the Sending Logs link in my sig)?
I may have found answer to my problem. This because I wanted to reinstall the OS6.6.0 firmware to see if this would solve my issues.
I then noted in the description that if one installed OS6.6.0 firmware one had to install V6.5.2 first (or system had to be V6.5.2) not shure if my system was 6.5.2. As far as I know latest version I installed before 6.6.0 was 6.5.1. Perhaps this can be found in log files?
So perhaps I upgraded from 6.5.1 directly to 6.6.0, and this is causing my issues, for as I mentioned this brrfs search forward +2d4 error started occuring after I upgraded my system to 6.6.0. Do have the NAS set to auto update, but perhaps 5.5.2 was skipped as versions follow each other quite rapidly.
So here is my questions:
1/. Can someone find out (=or help me how I can check in logs) if NAS was on 5.5.2 before going to 6.6.0
2/. Is there a method to downgrade to 5.5.1, in order to go via 5.5.2 to 6.6.0? If so how would this work
Can anyone tell me how to do this (the build in update utilitiy only allows me to replace 6.6.0 by 6.6.0 (reinstall) but dus not allow me to downgrade to 5.5.2 or 5.5.1)
3/. What is so special in V 5.5.2 and is not changed/installed when I move directly to 6.6.0, and would the system not warn me for this? Feels a bit stupid if Netgear would allow updating to 'incomplete/incompatible' firmware versions. Warning would be in place, similar to not allowing downgrading....
Hope someone knows how to do downgrade
Hans_Kusters wrote:
2/. Is there a method to downgrade to 6.5.1, in order to go via 6.5.2 to 6.6.0? If so how would this work
Can anyone tell me how to do this (the build in update utilitiy only allows me to replace 6.6.0 by 6.6.0 (reinstall) but does not allow me to downgrade to 6.5.2 or 6.5.1)
Netgear says not to attempt this downgrade. The method to do it requires a factory reset, and it has some risks. If it comes to that, you'd be better off just doing the factory reset w/o the downgrade. That would do a clean install.
But wait until mdgm gets back to you on the logs before taking action.
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