OK, I don't see any hardware errors (i.e. your cable and disk are probably fine), but this:

EXT2-fs warning (device ide0(3,4)): ext2_free_inode: bit already cleared for inode 5644

means you should check your partition. This is described in the FAQ:

http://www.riocar.org/modules.php?op=modload&name=FAQ&file=index& myfaq=yes&id_cat=8&categories= Known+problems+and+troubleshooting+questions#162

Peter

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