Hi, new here, please be gentle to me 
I have a LeMaker Banana Pi (http://www.lemaker.org/product-bananapi-specification.html) running a WD red on SATA.
I have followed these instruction https://alinacierdem.com/cheap-diy-nas-server/ 
From time to time the system is getting unresponsive and I could not find the root cause. Recently disabled media servers but still have the problem.
What should be the debugging steps?
What should be the debugging steps?
Running armbianmonitor -m in one terminal while you run stress -c 2 in another. If you power your board through Micro USB this might be the culprit (voltage drops). Also post the output from armbianmonitor -u please.
Temperature increases but voltages seems stable.
00:04:17: --- 0.40 19% 9% 8% 0% 1% 0% 50.3°C 43.7°C 5.15V 0/6
00:04:23: --- 0.37 7% 6% 0% 0% 0% 0% 49.9°C 43.6°C 5.12V 0/6
00:04:28: --- 0.42 11% 10% 0% 0% 0% 0% 50.1°C 43.6°C 5.14V 0/6
00:04:36: --- 0.60 38% 9% 28% 0% 0% 0% 53.4°C 45.8°C 5.12V 0/6
00:04:52: --- 1.12 100% 4% 94% 0% 0% 0% 55.3°C 46.4°C 5.12V 0/6
00:05:06: --- 1.68 99% 5% 93% 0% 0% 0% 55.7°C 47.5°C 5.11V 0/6
00:05:23: --- 1.96 100% 6% 93% 0% 0% 0% 56.4°C 48.1°C 5.12V 0/6
00:05:41: --- 2.26 99% 5% 94% 0% 0% 0% 56.5°C 48.8°C 5.12V 0/6
00:06:00: --- 2.66 100% 5% 94% 0% 0% 0% 57.3°C 49.1°C 5.12V 0/6
00:06:11: --- 2.64 100% 7% 92% 0% 0% 0% 57.8°C 49.7°C 5.13V 0/6
Didn't know this tool
It's not undervoltage (this happens very often with Micro USB powered boards) and there are no traces of anything going wrong in the log output. As such running out of ideas 
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