linux-kernel - Aerospace and linux

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Message-Id: <201006131826.58146.nuclearcat@nuclearcat.com>
Date:	Sun, 13 Jun 2010 18:26:58 +0300
From:	Denys Fedorysychenko <nuclearcat@...learcat.com>
To:	legerde@...il.com, linux-kernel@...r.kernel.org
Subject: Aerospace and linux

>Storage will probably be something really cheap.  So I assume flash.
>But, possibly a USB stick type device.   Maybe an IDE based solid
>state storage device.

Most of commercial controllers (USB and IDE) use intermediate cache/buffer 
memory, that will be vulnerable to byte flipping (as i know even SRAM 
vulnerable to that).	Some of them have their own firmware, storing somewhere 
chip wearing information, and if bit flipping happen there - they just will 
fail (common issue: USB flash not recognized anymore or have 0 bytes 
capacity).

	I guess you need truly embedded device, including PCB design, and operate 
with storage chips directly (RAM, flash chips). Also flash (NOR and NAND) 
vulnerable to bit-flipping too, and it is prefferable to use hardened IC's (i 
doubt there is hardened USB/IDE controllers), protected bus design, strong 
error recovery algo's, system and parts redundancy and etc.
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