[Beowulf] Data Destruction

[Paul Edmon]

Occassionally we get DUA (Data Use Agreement) requests for sensitive 
data that require data destruction (e.g. NIST 800-88). We've been 
struggling with how to handle this in an era of distributed filesystems 
and disks.  We were curious how other people handle requests like this?  
What types of filesystems to people generally use for this and how do 
people ensure destruction?  Do these types of DUA's preclude certain 
storage technologies from consideration or are there creative ways to 
comply using more common scalable filesystems?

Thanks in advance for the info.

-Paul Edmon-