Miles Nordin said:

>JFS is (i think?) the ancestor of the Veritas filesystem, so it is in
>practically every VendorUnix, and maybe even some releases of Netware--not
>sure.

JFS came to AIX from OS/400. It was around a few years before Veritas.

>One cool thing about the AIX implementation is that you can shrink and
>grow _mounted_ filesystems.  Depending on how much code they actually
>release--this is always a huge issue with these little attention-hogging
>annoucements--JFS could have some polished features LFS doesn't.

You can grow them, but you can't shrink them. You may be thinking of
Veritas and HPUX. JFS is a good filesystem, but it's real strength is
in all the FS manipulation utilities built into AIX. 
-- 
Rick Kelly  rmk@rmkhome.com  www.rmkhome.com