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Old 10-09-2013, 04:12 PM   #1
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Registered: Jan 2013
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Coping with power loss

I'm configuring a Gentoo system on a Single Board PC (Atom), which will run headless and collect datas from sensors.

I will run where power is not always guaranteed. There may be intermittent power fails and brown-outs. I am worried that if there are too many fails, there is increased chance of it failing to boot due to corruption like a desktop OS.

I hear that the Raspberry Pi can be turned off without any problems. How do they achieve this? I would like to do the same thing.

Do I just need to use journaling? ext3? At the moment I have ext2 boot and ext3 root. Perhaps I should change boot to ext3 too and it will be ok?

I could make battery back-up for it, but I'd rather use Linux.

Thank you all.
Old 10-09-2013, 07:25 PM   #2
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No system is immune to disaster. The design of the hardware doesn't prevent this in your case. There are some industrial systems that do much better but you won't want to pay that much.

So, you have a few ways to protect your system. For sure you don't want ext2 in my opinion. Fast maybe, safe no way. I'd move up to ext4 myself.

There may be a way to set /boot loader and OS on a read only partition or even separate CF card or disk. We used to run VAX off a read only disk and I don't think it ever failed in decades.

There are some ways to mount a aufs or squashfs or other read only files too as system.

There may be ways to construct a pre-boot or reboot script that does checks or even tries to report.

Pretty sure other folks here may know some ideas too.
Old 10-09-2013, 09:18 PM   #3
Registered: Apr 2013
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Take a look at this recent thread on a similar topic:
LinuxQuestions: Suggestions/recommendations for system that will NEVER be shut down gracefully?


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