[syslinux] ext4, boot error after writing irrelevant files on same partition

[Gert Hulselmans]

Running filefrag after a working boot and after copying the files which
breaks booting, might be useful too.

    filefrag -v /mountpoint/ldlinux.sys

If the results are not the same, it would explain why the booting fails.

Greetings,
Gert

2015-05-20 13:45 GMT+02:00 Ferenc Wagner via Syslinux <syslinux at zytor.com>:

> Denys Fedoryshchenko via Syslinux <syslinux at zytor.com> writes:
>
> > I faced very strange problem, after i install extlinux, on ext4
> > partition and i wrote some files (they doesn't touch syslinux files),
> > system refuse to boot and gives "Boot error".
> > I checked ldlinux.sys, file is fine, checksum is intact and etc.
> > Running extlinux -i /mountpoint sure fixes the problem.
> >
> > What are the steps to troubleshoot the problem?
>
> What are the steps to reproduce the problem?  Something like:
>
> # extlinux -i /mountpoint
>
> test booting => works
>
> # md5sum /mountpoint/ldlinux.sys >ldlinux.md5
> # cp /what/file /mountpoint
> # md5sum -c <ldlinux.md5
> OK
>
> test booting => fails
>
> # extlinux -i /mountpoint
>
> test booting => works
> --
> Feri.
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