can xfs_repair guarantee a complete clean filesystem?

[hank peng]

When using xfs_repair, I want my XFS filesystem complete clean and
continue to work even if some files lost. Becase we use XFS in low-end
NAS box, customers want a tool to repair the filesystem when it has
problem and they allow some files be lost and don't want the whole
system to stop.
So, I wonder if xfs_repair or some other tools can satisfy this funciton?

-- 
The simplest is not all best but the best is surely the simplest!