Re: Power supplies and reliability

I just remembered that several of my IPMI/BMC chips do report the
voltages on various power rails. While this is awesome it does not
report if the power from the power supply to the HDD is low/high

So the power that the BMC sees in the board is something that could be
monitored and alert on when troubleshooting strange situations

On Thu, Jun 4, 2026 at 1:53 PM David Christensen
<[email protected]> wrote:
>
> On 6/3/26 19:12, Eben King wrote:
> > On 6/3/26 10:36, Stefan Monnier wrote:
> >>> They are also going to be polled, and will return the voltage they find
> >>> at polling time. What they won't tell you is what various ripple
> >>> voltages are, both the initial rectified mains at 100/120Hz and the
> >>> residual switching frequencies of the various step-down regulators.
> >>
> >> Yeah, I think we'd need a kind of sensor that doesn't give just the
> >> current voltage but gives a bracket of the lowest & highest voltage seen
> >> since the last measurement, or one that can trigger an interrupt if the
> >> voltage ever goes outside of a given range.
> >
> > I want something that does a Fourier transform of the voltage data so I
> > can see if there's ripple at any particular frequency. A live waterfall
> > plot would be wonderful.
>
> https://www.tek.com/en/products/oscilloscopes/dpo70000sx
>
>
> David
>


-- 
- Andrew "lathama" Latham -