I think you should use raw LV. It is the only way to make ADSM aware
of what is really written on the disk. The JFS buffering can improve
performances, but in case of a system crash, your database can be
inconsistent. As i understand it, the JFS log concern only the filesystem
structure and not the file's content.

If there is a problem with database corruption when the server is not
correctly shut down, that is a bug in ADSM which must be corrected.
A database manager must ensure the integrity of the database but for
this, it needs to know the real state of the database (what is the content
of the disk ? ).

If there is a way to bypass the JFS buffering, i would be thery happy to
know it as i need it for performance reason.

Pierre Verpeaux