[Hidden-tech] Seeking advice on protecting a Linux box from failures

Neal Priestly neal.priestly at gmail.com
Thu Aug 25 14:47:56 EDT 2011


The cleanest power output I've actually metered on the bench was from an
Oneac UPS.  If I recall correctly they do have a line that feeds the powered
device off the battery side, rather than crossing over when the AC source
fails.

They are appreciably more expensive than a similarly sized APC UPS.  Given
your use case, they may be a good fit.  I recall that they aren't designed
with portability in mind, but since I wasn't moving them about I don't
recall how awkward/heavy they were.  That may or may not be a deal
killer....

-Neal Priestly
 Free Range Technologist



On Thu, Aug 25, 2011 at 2:05 PM, Daniel Belmont <dbelmont2 at gmail.com> wrote:

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>
>
> I have a special purpose Linux machine that is used to run musical
> instruments and is
> used frequently in concert settings ... so preventing failure is of
> importance ... I am
> looking for advice on two things :
>
> 1) I need a UPS that produces pure sine waves, has reliable battery backup
> that will
> instantly kick in during voltage dips, isn't too heavy (or wildly
> expensive), rack
> mountable would be nice (but I can deal with something that is around 25
> pounds
> even if it is not rack mountable), and does voltage regulation ... someone
> suggested
> that there are UPS's that always provide power from the constantly
> recharging
> battery -- that could be interesting ...
>
> The reason I am asking for something with these specific qualities is that
> I had a
> power outage at a concert this past weekend -- the LInux box was plugged
> into a
> UPS that puts out simulated sine waves (and the power supply on the Linux
> machine
> does active power factor correction which needs pure sine waves), there was
> a voltage
> dip, the UPS battery kicked in and the Linux box shut down as if it lost
> power due to the
> sine wave mismatch ... apparently this kind of thing can destroy the hard
> drive (which
> would be a big problem) as well as causing problems for Linux startup (this
> did happen
> but that problem seemed to correct itself within a few minutes) ...
>
> 2) what kind of care do I need to provide to the Linux box so that it works
> like
> a mission critical computer ? the right kind of UPS seems important,
> backing
> up the hard drive is a given (I am doing this now) ... are there other
> things I need
> to do to treat this computer well ? again, since it is a musical instrument
> I am
> very desirous of eliminating all of the possible causes of failure (to the
> extent that
> I can) ...
>
> Thanks !
>
> Dan Belmont
> The Soul Sensations
> www.TheSoulSensations.com
>
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