Random shut-offs

[BreakfastPurrito]

I am trying to fix a problem that's been plaguing my Unraid box for months now. It randomly shuts off. Not shuts down, just cuts power and shuts off. And I can't seem to fix it. It has so far already destroyed one hard drive and it starting to cost me real money.

 

I have tried:

- Different versions of Unraid

- Different versions of drivers

- Replacing the PSU

- Replacing the GPU

- Different versions of plex, home assistant or any other containers I'm running.

 

I also can't find anything in the logs. For example, yesterday night it cut power somewhere after 6:26 and me powering it on at 10:13:

 

Quote

Jul 29 00:00:01 BigNAS Plugin Auto Update: Checking for available plugin updates
Jul 29 00:01:32 BigNAS Plugin Auto Update: community.applications.plg version 2022.07.26 does not meet age requirements to update
Jul 29 00:01:32 BigNAS Plugin Auto Update: compose.manager.plg version 2022.07.28a does not meet age requirements to update
Jul 29 00:01:32 BigNAS Plugin Auto Update: Update available for nvidia-driver.plg (Not set to Auto Update)
Jul 29 00:01:32 BigNAS Plugin Auto Update: Community Applications Plugin Auto Update finished
Jul 29 00:22:42 BigNAS emhttpd: read SMART /dev/sdb
Jul 29 01:32:51 BigNAS emhttpd: spinning down /dev/sdb
Jul 29 02:03:38 BigNAS emhttpd: read SMART /dev/sdb
Jul 29 03:14:48 BigNAS emhttpd: spinning down /dev/sdb
Jul 29 04:06:16 BigNAS emhttpd: read SMART /dev/sdb
Jul 29 06:26:31 BigNAS emhttpd: spinning down /dev/sdb
Jul 29 10:13:40 BigNAS kernel: microcode: microcode updated early to revision 0x28, date = 2019-11-12
Jul 29 10:13:40 BigNAS kernel: Linux version 5.15.46-Unraid (root@Develop) (gcc (GCC) 11.2.0, GNU ld version 2.37-slack15) #1 SMP Fri Jun 10 11:08:41 PDT 2022
Jul 29 10:13:40 BigNAS kernel: Command line: BOOT_IMAGE=/bzimage initrd=/bzroot

 

Has anyone else experienced this problem? What can I do to fix it?

[JorgeB]

This suggests a hardware problem, PSU or board would be the main suspects, also the UPS if one is being used.

 

 

[MAM59]

you may buy an "online ups", the random shut offs can happen (to any pc, nothing to do with unraid) if the line voltage is higher than the maximum your PSU can handle.

Here for instance, I had this quite often when the voltage got above 240V. Clear Day, bright sun, lot of winds, lazy guy at the power control office...

 

The "online" (always on, gets charged if the line is up, but feeds the devices always with her own battery) UPS generates a permanent voltage / sine wave independent from your power line.

 

 

[BreakfastPurrito]

28 minutes ago, MAM59 said:

you may buy an "online ups", the random shut offs can happen (to any pc, nothing to do with unraid) if the line voltage is higher than the maximum your PSU can handle.

Here for instance, I had this quite often when the voltage got above 240V. Clear Day, bright sun, lot of winds, lazy guy at the power control office...

 

The "online" (always on, gets charged if the line is up, but feeds the devices always with her own battery) UPS generates a permanent voltage / sine wave independent from your power line.

 

 

Thank's for the tip, but it's connected to a Cyberpower 1500W sine wave UPS.

[BreakfastPurrito]

1 hour ago, JorgeB said:

This suggests a hardware problem, PSU or board would be the main suspects, also the UPS if one is being used.

 

 

I'm really hoping it isn't.

[JonathanM]

3 hours ago, BreakfastPurrito said:

Thank's for the tip, but it's connected to a Cyberpower 1500W sine wave UPS.

That's a standard switching UPS, it keeps the batteries charged on standby, but passes line power through unless it detects an anomaly, and then it switches to battery power. Totally different concept than

3 hours ago, MAM59 said:

The "online" (always on, gets charged if the line is up, but feeds the devices always with her own battery) UPS generates a permanent voltage / sine wave independent from your power line.

 

I'm not saying that's the cause, but it wouldn't hurt to take it out of the circuit long enough to test, IF your power is generally stable. If you have flaky line voltage, then you need to test with a different UPS to rule it out as being the cause.

 

Constant "online" UPS tend to be rather expensive, and are used for critical applications like medical equipment and such. A good switching UPS with AVR should be sufficient for typical electronics.

 

(Disclaimer, I personally have 3  2KVA online UPS running all my household electronics, because I got them at a surplus auction and I like overkill.)

 

3 hours ago, BreakfastPurrito said:

I'm really hoping it isn't.

Software is not normally capable of cutting power on the main board without an event being logged, the only exception I can think of is IPMI control.