[ale] Need help building a read only Linux appliance

[Ron Frazier (ALE)]

Perhaps you could boot from an iso of a live cd from a write protected sd card or usb stick.

Also, you could put a supercap in the power circuit to hold the power up for several hundred or thousand ms while shutdown or sleep occurs.

Sincerely,

Ron



Richard Bronosky <richard at bronosky.com> wrote:

>I'm hoping to design a system that any parent can build themselves.
>Ideally
>this would mean:
>1. no soldering
>2. runs on ignition switched power (no need to tie into constant/clock
>power as has been suggested elsewhere)
>
>I'll add your link to my reference material, but at a price greater
>than
>the RPi, it would be my absolute last resort.
>
>As simontek noted, Linux live CDs work this way. Also, Linux based
>routers
>are power fault tolerant. That's the route I want to go.
>
>
>On Mon, Dec 10, 2012 at 9:16 AM, Dennis Ruzeski <denniruz at gmail.com>
>wrote:
>
>> 1- The last computer I could just turn off ran DOS 6.. Wanna go back
>> there? Be be guest.
>> 2- I don't think a read-only system is ideal here. Use this instead-
>>
>>
>http://store.mp3car.com/Micro_Shutdown_Controller_p/PWR-007.htm?ProductCode=PWR-007&Click=29952
>>
>> Good luck! I'll be rolling a car pc here in the next few weeks on a
>> RPi. We should exchange notes when we're done or maybe this is a good
>> meeting subject?
>>
>> --Dennis
>>
>>
>>
>> On Mon, Dec 10, 2012 at 8:39 AM, Richard Bronosky
><richard at bronosky.com>
>> wrote:
>> > Don't know why this failed before...
>> >
>> > ---------- Forwarded message ----------
>> > From: "Richard Bronosky" <Richard at bronosky.com>
>> > Date: Nov 30, 2012 1:17 AM
>> > Subject: Need help building a read only linux appliance
>> > To: "Atlanta Linux Enthusiasts - Yes! We run Linux!" <ale at ale.org>
>> > Cc:
>> >
>> > I want to turn one of these Raspberry Pis into a car-puter that
>will
>> only be
>> > used to play videos from a USB drive. It needs to be able to
>survive
>> having
>> > the power cut off without being shut down. (Remember when you could
>do
>> that
>> > to a computer?)
>> >
>> > Anyone have any suggestions on how to do this?
>> >
>> > I'd also like to include a very tiny partition where the video
>player can
>> > write a progress indicator files every 15 seconds to be used to
>resume
>> > playback. That can come later though if it complicates matters.
>> >
>> > --
>> > .!# RichardBronosky #!.
>> >
>> > _______________________________________________
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>> >
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>>


--

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Ron Frazier
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