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I'm trying to use Ubuntu 10.04/32 in an embedded environment with no keyboard attached. Power interruption is expected and happening quite often. Right now I get a splashscreen requiring some keyboard input, if some ext3 partition gets corrupted. I need that to be handled automatically, without any user input. What is the best strategy for dealing with this?

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What error are you getting exactly? Is it an actual file system error, or just the regular checks that occur after a given number of times the file system has been mounted? –  James Henstridge May 31 '11 at 13:37
    
It is an actual filesystem error, provoked deliberately by pulling the plug on system shutdown. –  zeroc8 May 31 '11 at 14:51
    
Be sound, unmount! –  Stefano Palazzo May 31 '11 at 15:30
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2 Answers 2

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Edit the fstab entries to disable fsck:

# <file system> <mount point>   <type>  <options>       <dump>  <pass>

UUID=blah       /               ext4    defaults        0       0

The important part is 'defaults 0 0' - that will mount it without doing checks and is the same on ext3.

For when you are able to do a managed upgrade (and need to do the diskcheck) simply:

sudo touch /forcefsck

That will force the fsck just the once on the next reboot.

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I guess I will disable fsck and add a mainenance item in my app to check the filesystem on reboot once in a while. –  zeroc8 May 31 '11 at 17:39
    
The other thing is to leave those old kernel entries on the boot because sometimes they can magically rescue a failed, 'disk not recognized, down to Busybox level' boot situations. –  Mathew May 31 '11 at 17:43
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The best strategy is to prevent a disaster;

  1. UPS (uninterruptible power supply) - keeps mission critical systems operational during main power supply outages.

  2. Get Nut (https://help.ubuntu.com/community/UPSwithNUT)

  3. Test bench the solutions before using in a production/critical enviornment

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