Re: Corrupt superblocks

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fabian-buettner@xxxxxx wrote:
> Hello,
> 
> After updating my gentoo machine (new udev, lvm2) and rebooting, my initrd was 
> broken (i had CONFIG_SYSFS_DEPRECATED and CONFIG_SYSFS_DEPRECATEDV2 activated) 
> and the new udev didn't like these settings.
> So I received a warning regarding this issue. Unfortunately I had set the init 
> bootparameter to init=/sbin/bootchartd. And when i was returning from getting 
> a cup of coffee. Bootchartd was spamming my console telling me: No space left 
> on the device (or similar). When i was seeing this i had instantly a VERY bad 
> feeling about what was going on there.
> 
> So i put in the rescuecd, chrooted into my old system, built a new kernel 
> without these deprecated options, rebooted again.
> 
> This time fsck.ext4 was telling me: No such file or directory while trying to 
> open /dev/vg/root, the superblock could not be read.

This looks more like a storage problem tnan an ext4 problem.

> That's the story how I managed to corrupt my superblock and probably also it's 
> backups.

Why do you say you have a corrupted superblock?

I suppose I'd try booting a live/rescue cd, and just manually run e2fsck
against your root device, as a starter - and capture any interesting output.

Any sort of kernel or fsck logs indicating more of what actually went
wrong would be Very helpful here.

-Eric

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