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Lost power problem on (linux) embedded devices !

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hoalanhuong

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Hi,

Do you have any idea/source/ebook/technical report/solution regards on the problem of software architecture/hardware design of linux embedded divices that could secure the OS if the device is lost power so the OS will not damage?

I'm designing a linux embedded device but the problem of sudden power off (like: unplug the power cable, turn the power switch off, ... which may damage the OS while it running and may be in the next turn on the device will have to scan disk, fix errors bla bla...) is still a big question.

Hope to receive any hint.

Thanks.
HLH
 

I don't see how the OS can be damaged if there is a loss of power. You can have data los of corruption in the file system only. But if you are using some of the journaling file systems like ext3 you should be fine, after reboot, system will restore filesystem in the state before power loss, using provided journal. If you are using Flash memory than JFFS2 or JFFS3 should be used.
 

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