Priority shutdown on power event from UPS

[CarbonPepper]

With normal shutdown, the QNAP closes down apps and services one-by-one, and is very slow in doing so.

In a power event, the instruction from the UPS should initiate a priority shutdown, sacrificing apps for quicker shutdown. 1 minute max.


Reasoning:
On 18th Feb, storms here in the UK took out our power for 11 hours. The day after I discovered that the QNAP failed to shut down properly on instruction from the UPS, and I lost a disk as a result. So a replacement is rebuilding the RAID right now. This has happened twice before. Once I was around and could intervene via ssh, but the other time I had bad sectors.

With a runtime of 30 mins, I have the QNAP set to shut down in 5 minutes. It will then take another 5 to 10 minutes to close all the apps and shut down. So 10 minutes , but I would prefer a 1 min shutdown which means the hardware is off in 6mins. I don't care about the apps when my data is at risk from HDD crash.

Some might suggest that this feature isn't needed because you can just buy a bigger UPS, but recharge time is more important that runtime. Most small office UPS will take more than a working day to recharge, so if you get more than one power outage (very common in rural locations), the UPS will deplete sharply.

[dolbyman]

What makes you think the most important thing (unmounting the file system) would work without shutting down all services first?

But as always, QNAP does not come here..so all in vain unless you contact QNAP via ticket

[dosborne]

As you have seen, the user configurable options in relation to a UPS are very limited.

There may be a way running NUt or some other utility, perhaps in a container, that runs a script with a "kill -9" code loop, but I'm really just guessing.

Just killing processes though would likely lead to a whole bunch of issues on restart.

Best practice with what we have currently, I would think, is to minimize the number of applications you actually use and perhaps reevaluate the ones you do run by running a manual shutdown to try and see which are "slow". My units shut down within 2-3minutes of issuing the command, iirc. They take about 10+ to start up though.

[Skwor]

This is why I set my power down to 1/2 the time the UPS shows it can run. Basically ensuring there is time to always shut down my NAS. Imperfect solution but better then risking any corrupted files.

[Toxic17]

thread closed

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