>The "new" TSM runing guide recommends using RAW volumes for performance
>reasons. I have a client that doesn't want to go RAW because the JFS logging
>goes away. I'm not that AIX savy to be able to argue one way or the other
>with him...

Bill -

See "The Advantages of Using Journal File System Files" in the Admin Guide
for the gospel.  Not that two IBM sources might give conflicting 
recommendations...

The biggest undocumented issue with raw volumes is in "visibility": site
management typically involves a bunch of people who are not always cognizant
of everything: without a file system on the volume, its purpose and usage is
far less apparent than a volume with a well-defined and readily viewable
file system.  This greatly increases the probability of "accidents"...very
expensive accidents.

   Richard Sims, BU