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Forum Discussion
Readynas Ultra 6 freezes
I have a problem with my Ultra 6. (Work on Readynas OS 6) When I defrag my data the nas freeze. I tried everything: - Test disk -> Ok (smart ok for all disk) - Scrub -> Ok - Balance -> Ok I t...
Yes the shell froze.
I look in the logs, but do not see anything bad.
Retired_Member wrote:
I look in the logs, but do not see anything bad.
Maybe enter journalctl | grep -i btrfs and look in that output for file system errors. Also look at the smart stats for any signs of disk issues.
This problem is likely happening in one share. You can run your manual balance on individual shares (because each share is a btrfs subvolume). So if you aren't seeing btrfs errors or any SMART issues, that might be the next step.
In kernel.log
Last entry before the last freeze (During Balance)
Feb 15 05:42:17 nas-EB-0C-F6 kernel: BTRFS info (device md126): found 16 extents
Feb 15 05:42:18 nas-EB-0C-F6 connmand[3073]: ntp: adjust (jump): +0.900246 sec
Feb 15 05:42:19 nas-EB-0C-F6 systemd[1]: Time has been changed
Feb 15 05:42:40 nas-EB-0C-F6 connmand[3073]: ntp: adjust (jump): -0.862266 sec
Feb 15 05:42:39 nas-EB-0C-F6 systemd[1]: Time has been changed
Feb 15 05:42:41 nas-EB-0C-F6 connmand[3073]: ntp: adjust (jump): +1.116711 sec
Feb 15 05:42:42 nas-EB-0C-F6 systemd[1]: Time has been changed
Feb 15 05:42:45 nas-EB-0C-F6 kernel: BTRFS info (device md126): relocating block group 10222152187904 flags data
Feb 15 05:43:02 nas-EB-0C-F6 connmand[3073]: ntp: adjust (jump): -0.864617 sec
Feb 15 05:43:01 nas-EB-0C-F6 systemd[1]: Time has been changedThe NTP entries are normal, but your time adjustments look quite large. Most of mine are less than one millisecond, and the largest I see around 40 milliseconds. I am in the US, and use us.pool.ntp.org servers (0.us.pool.ntp.org and 1.us.pool.ntp.org). You might look into alternative NTP servers instead of using the default Netgear ones - especially if you are not in the US.
I guess you could try disabling NTP (the settings wheel is next to the time on the system overview page), and run the balance again - but I think the time change is very unlikely to be trigger for your problem. More likely it's a disk problem or file system corruption that is specific to those 16 extents.
You could of course do a full backup, a factory reset, then reconfigure the NAS and restore all the data. Or attempt to isolate it by running the manual balance on each share (likely the freeze will only happen on one). Then you can try backing up that share, deleting it, and then recreating it.
I use time-e.netgear.com and time-a.netgear.com ntp server.
I live in France, it's a reason the largest adjustments.
I thinks the problem it's due to a data corrupt, i try to isolate the bad volume.
If i try balance via the frontview interface, the ReadyNas not freeze.
I look the maintenance history, the problem is not recent
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