System Hard Crash and Recovery

[Joy Almacen <joy@xxxxxxxxxxx>]

Hello,

Just inherited an XFS-enabled  system (RH7.1 Linux version 
2.4.2-SGI_XFS_1.0smp).  A few days ago the server locked up and we had to do
a hard reboot.  Everything rebooted just fine except for some weird 
things about
some files.  They reverted back to old versions ( a few days back). I do 
not know if this has something to do with disk allocation and writing 
(caching?).  

My question is how can I  check what has caused this weird reversion to 
the old versions of our production scripts? Also, is there a way to 
recover data,  backup was not enabled on prior to system crash, thru xfs 
utilties?
Thanks a lot,

Joy