On 10/17/2025 12:16 PM, void wrote:
On Fri, Oct 17, 2025 at 09:56:29AM -0400, mike tancsa wrote:
Not sure if it helps in this case or not, but If you capture smartctl
info regularly, you can some times infer from the disk power cycle
count and power on hours if the box rebooted due to a power issue or
not.
Good point.
I'm unsure how I'd distinguish between soft power cycle
and reboot though. The latter i'd expect to increment power cycle
count the former might but it might not.
In my case, I had it with a failing power supply or one that could not
deal with load. In my case showed power cycle counts increasing. Where
as, a shutdown -r now before
0{r-14mfitest}# smartctl -a /dev/ada0 | grep -i power
entering power-saving mode.
9 Power_On_Hours 0x0032 100 100 000 Old_age
Always - 40206
12 Power_Cycle_Count 0x0032 100 100 000 Old_age
Always - 91
0{r-14mfitest}#
and after a reboot
s0{r-14mfitest}# smartctl -a /dev/ada0 | grep -i power
entering power-saving mode.
9 Power_On_Hours 0x0032 100 100 000 Old_age
Always - 40206
12 Power_Cycle_Count 0x0032 100 100 000 Old_age
Always - 91
0{r-14mfitest}#
At least on my SuperMicro board shows the same power cycle count. Like
you said, probably does not apply in your case, but sometimes handy to
keep in the back pocket
---Mike
