Error,

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08 Dec 2016 15:22 #83775 by tjamscad
Error, was created by tjamscad
This morning the machine operator said the hadwheel started acting erratic. I told him to close LinucCNC and reopen it. When he did this comes up.
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08 Dec 2016 15:39 - 08 Dec 2016 15:41 #83777 by Todd Zuercher
Replied by Todd Zuercher on topic Error,
I am assuming the machine was stable, with acceptable latency before.
What may have changed on the machine?
Was new hardware added? (maybe a real-time unfriendly USB device.)
Was the computer shutdown with a dead cmos battery causing it to reset to a default setting with poor latency?
Last edit: 08 Dec 2016 15:41 by Todd Zuercher.

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08 Dec 2016 15:42 #83778 by tjamscad
Replied by tjamscad on topic Error,
Yes, the machine ran all night and and most of the morning untill it got weird. It has been running the same program for a week.

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08 Dec 2016 16:20 #83780 by PCW
Replied by PCW on topic Error,
It may be nothing, but this looks weird to me:

why is it mounting a file system at this point and what is it recovering from?

[ 1254.467145] EXT4-fs (sda2): warning: maximal mount count reached, running e2fsck is recommended
[ 1254.468391] EXT4-fs (sda2): recovery complete
[ 1254.468574] EXT4-fs (sda2): mounted filesystem with ordered data mode

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08 Dec 2016 20:02 #83801 by tjamscad
Replied by tjamscad on topic Error,

It may be nothing, but this looks weird to me:

why is it mounting a file system at this point and what is it recovering from?

[ 1254.467145] EXT4-fs (sda2): warning: maximal mount count reached, running e2fsck is recommended
[ 1254.468391] EXT4-fs (sda2): recovery complete
[ 1254.468574] EXT4-fs (sda2): mounted filesystem with ordered data mode


None of that makes any sense to me.

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08 Dec 2016 20:03 #83802 by tjamscad
Replied by tjamscad on topic Error,
Good news, for now. It is working. I ran memtestx86 and after a few hours and no errors found I rebooted and it is working fine.

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13 Dec 2016 17:24 #84046 by tjamscad
Replied by tjamscad on topic Error,
Bad news it's back, not running

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13 Dec 2016 18:04 #84047 by PCW
Replied by PCW on topic Error,
Same dmesg error?

sounds a bit like failing hardware

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13 Dec 2016 19:27 #84052 by tjamscad
Replied by tjamscad on topic Error,
Yes saying error I am running memtest

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13 Dec 2016 19:30 - 13 Dec 2016 20:12 #84053 by cncnoob1979
Replied by cncnoob1979 on topic Error,
I would clone the hard disk or replace the hard disk with a backup immediately. Looks like the disk is about to fail, or it too late and has failed already.

EXT4-fs (sda2): warning: maximal mount count reached, running e2fsck

this has been flagged on the Linux file system. Sometimes typical power failures ect.. causes corruption and can be tagged as needing to be checked with e2fsck. But in your case a steady build that is acting "strange" indicates a failing disk. Or corrupt data is being written for other reasons, faulty hardware ; memory ; drive controller.



EDIT: have you ran e2fsck to check the file system?
sudo tune2fs -c 0 /dev/sda2
e2fsck -v /dev/sda2

Link here

This should reset the mount count warning. The issue is perhaps you have corrupted data, either from faulty drive or from multiple powerfailures ect without running e2fsck afterwards. (not shutting down completely prior to power off)

my .02 ;)

Realtime system did not load


Have you tried to reload linuxcnc after you get his error? Sometimes when I get this error a reload will bring it back up.
Last edit: 13 Dec 2016 20:12 by cncnoob1979.

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