Hi,Ultra4 was running 6.2.2 with minimal services enabled (SMB+UI), 4x Hitachi 5K3000 2TB in RAID-5; updated to 6.2.4 a couple of days ago, uploaded with 2+TB files, 1. Today was uploading a large file, a few seconds later Ultra4 disconnects from network, power button turns on LCD which display IP address2. Re-plug network cable, was able to ssh in, top command screenshot as below, system was 0% idle, what was OS running at that time? UI was very slow.3. Shortly after Ultra4 disconnects from network again, re-plug network cable doesn't get network back, can't reach by hostname or IP. Power button doesn't do anything, LCD has no display.What was OS running?What could have caused this?What to do next?Thanks. 8)

The I saw high btrfs cpu usage a while back and it was bad memory. I had high journal CPU usage also. You might try running journalctl in an SSH terminal and see if anything looks weird.See this thread for my problem: viewtopic.php?f=154&t=79790

I will do memory test.Is there a way to gracefully shut down the nas? It's not on the network and not responding to power button.

I doubt it. If you can get in over ssh you can run poweroff from the command line.

Ultra4 (6.2.4) disconnects from network

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arikalish
Apprentice
Jun 03, 2015
The I saw high btrfs cpu usage a while back and it was bad memory. I had high journal CPU usage also. You might try running journalctl in an SSH terminal and see if anything looks weird.

See this thread for my problem: viewtopic.php?f=154&t=79790
wli
Tutor
Jun 03, 2015
I will do memory test.

Is there a way to gracefully shut down the nas? It's not on the network and not responding to power button.
arikalish
Apprentice
Jun 03, 2015
I doubt it. If you can get in over ssh you can run poweroff from the command line.

wli

Tutor

Jun 04, 2015

had to hold power button to power off nas, rebooted and seems okay now.

journalctl didn't seems to have any error, dmesg has this:

[Wed Jun  3 22:21:07 2015] systemd-journald[1163]: Journal file corrupted, rotating.
[Wed Jun  3 22:21:07 2015] systemd-journald[1163]: Rotating...
[Wed Jun  3 22:21:07 2015] systemd-journald[1163]: Vacuuming...
[Wed Jun  3 22:21:07 2015] systemd-journald[1163]: Retrying write.

arikalish
Apprentice
Jun 04, 2015
Have you run a disk test?
wli
Tutor
Jun 04, 2015
arikalish wrote:
Have you run a disk test?

Are you referring to Disk Test in Boot Menu? I'm running memory test now.
mdgm-ntgr
NETGEAR Employee Retired
Jun 04, 2015
There is that boot menu option. There is also a volume schedule alternative.

Once you've run the memory test boot menu option for at least a few passes if that comes up fine I would then suggest running the disk test boot menu option.
wli
Tutor
Jun 04, 2015
Mem test has 0 error after 2 passes, took a bit over 1hr, now running Disk Test before sleep.
wli
Tutor
Jun 04, 2015
How to know the status of disk testing? after 6 hours:

LCD: Testing disks, not showing percentage
power button and number 1-4 flashing
StephenB
Guru - Experienced User
Jun 04, 2015
wli wrote:
How to know the status of disk testing? after 6 hours:

LCD: Testing disks, not showing percentage
power button and number 1-4 flashing
Try RAIDar - it might give you some more info.