It's a FAQ: http://xfs.org/index.php/XFS_FAQ#Q:_What_is_the_problem_with_the_write_cache_on_journaled_filesystems.3F http://xfs.org/index.php/XFS_FAQ#Q:_What_i

It's a FAQ: http://xfs.org/index.php/XFS_FAQ#Q:_What_is_the_problem_with_the_write_cache_on_journaled_filesystems.3F http://xfs.org/index.php/XFS_FAQ#Q:_What_is_the_problem_with... In summary: XFS used to default to having write-barriers disabled (for performance), which makes it prone to data-loss during power outages. This default has changed nowadays, but you must still review your controller-/disk-cache settings to ensure stuff is really flushed to disk when XFS thinks it is.