ReadyNAS frequently taking itself offline

[carpii]

I have a ReadyNAS Pro 4 which seems to be misbehaving lately.

Three times in the past month, it has suddenly become unresponsive without any alerts (Pinging the NAS times out, and all mounts disappear)

I've ruled out any network connectivity issues, as there are two other NAS on the same switch which remain responsive. 

I've tried swapping the cat5 cable over, using different ports on the switch etc, but it keeps recurring on the same NAS.

Trying to troubleshoot it using the buttons and LCD doesn't show anything out of the ordinary (the NAS thinks its still online and with the correct IP)

Doing a network scan using RAIDar cannot detect the NAS either

I've no option but to reboot the NAS, at which point it comes back

But there is nothing in the logs on Frontview which indicate it ever had a problem to begin with

Clearly the NAS is having some sort of problem, but I dont know where to begin

I do have SSH access and am familiar with linux but I cant see anything relevant in the logs on the NAS itself either

How can I troubleshoot this further?

Drives show no SMART problems (although this ReadyNAS is fairly new as my previous NVX failed  and NetGear sent me a Pro 4 as a replacement)

Thanks

[StephenB]

If you log in with ssh...  What do you see if you enter

df . -h

df . -i

I am wondering if the OS partition is full.

[carpii]

Hi Stephen, thanks for the reply

Looks to be plenty of space...

hole:~# df . -h
Filesystem Size Used Avail Use% Mounted on
/dev/md0 4.0G 709M 3.2G 19% /

hole:~# df . -i
Filesystem Inodes IUsed IFree IUse% Mounted on
/dev/md0 65536 14954 50582 23% /

[mdgm-ntgr]

Please send in your logs (see the Sending Logs link in my sig)

[carpii]

Thanks, I've emailed the logs over

Assuming its not hardware failure (which it may well be), there's two possible culprits spring to mind...

1) I installed PlexMediaServer add-on back in June. However I've been using it a fair bit since then and my problems only began around the start of August 

2) From what I can recall, this wouldroughly coincide with when I installed a UPS (APC Pro 500).

This ReadyNAS (hole) is directly monitoring my UPS, and then I have a 2nd ReadyNAS NVX (canyon) which is monitoring the UPS via hole (both set up in Frontview)

When my ReadyNAS becomes unresponsive, I do get email alerts warning me the UPS cannot be contacted, but its difficult to determine whether this is related to the cause of the problem, or just a symptom of the ReadyNAS losing connectivity

Thanks for any suggestions you can offer

[mdgm-ntgr]

You could certainly try disabling Plex and seeing if this helps.

I can also see that you set this unit up on very old firmware. You might wish to backup your data, do a factory default (wipes all data, settings, everything) and restore data from backup and reconfigure things and see if this helps.

[carpii]

> You could certainly try disabling Plex and seeing if this helps.

Thanks, I will try that. I was planning on moving Plex to a virtual machine once Ive trialled it, so now is a good time

If that doesn't work its probably time for a fresh install as you suggest

Cheers

[carpii]

Ok, well it seems I've ruled out Plex as being involved in the lock up. 

I removed the add-on last week, and Plex now runs from a virtual machine on a different host.

Tonight I got an email from my 2nd NAS saying it had lost connectivity to the UPS (but actually it just means it wasnt able to monitor the UPS since the first ReadyNAS has become unresponsive)

Same thing as before... suddenly my main ReadyNAS wouldnt respond to ping or Frontview, but pressing the button on the device it still seemed to think everything was ok (and it had an ip).

It came back after a hard reboot, but nothing in the Frontview logs other than 'Removed Plex' last week, and then 'System is up' today

Im now kinda convinced there is some incompatability with the APC Pro 500 UPS I bought, as these problems only started occuring when it was installed (and the ReadyNAS started monitoring it)

I guess I need to back it all up and factory reset.

I already rsync one share to my backup NAS, but there are two other shares not being backed up.

Would you recommend I just create identical shares on the backup NAS and rsync each share across individually, or is there a better way?

Thanks