MB> Actually, there is essentially no CHDKSK apart from UHPFS.DLL.  CHKDSK is
  > really just a front-end which calls the appropriate maintenance DLL for 
the
  > particular filesystem (except for FAT, where CHKDSK does the real work). 
  > CHKDSK does this by getting the filesystem type from the appropriate 
system
  > call, and then looking for a DLL file named "Uxxxxxxx.DLL" where 
"xxxxxxx" is
  > the string returned for the filesystem type.
 JD> If you must run HPFS386 under Warp 4.0, you have to remember
 JD> to downgrade uhpfs.dll every time you run a fixpak. The
 JD> problems I've documented, the sheer unsupported nature of
 JD> HPFS386 in this configuration and the marginal benefits of a
 JD> +2MB cache on a single-user machine make HPFS386 far too
 JD> risky to stomach on a production workstation.
MB> I just realized something.  You're talking about running HPFS386 in a 
totally
  > unsupported configuration!  HPFS386 is a component of Warp Server, which 
is
  > still shipping on the 3.0 kernel.  If you run HPFS386 on the 4.0 kernel, 
you're
  > on your own.
MB> There are several important advantages of HPFS386 over HPFS in a server
  > configuration.  First, HPFS386 supports access control lists, which 
improves
  > system security.  At a low level, access control lists are stored on the 
media
  > in roughly the same way as extended attributes, so regular HPFS should 
leave
  > them alone -- although it is not supported to run regular HPFS CHKDSK on
  > HPFS386 in any case.  Second, HPFS386 has the potential to be much faster 
than
  > regular HPFS when heavily loaded, because it runs more of the disk 
processing
  > at Ring 0 and using the Strategy2 multiple request kernel interface.
MB> I think, judging from what you are describing, that you are talking about 
the
  > case where a partition is formatted under regular HPFS and then the 
drivers are
  > switched over by hand to run HPFS386.  In this situation, the filesystem 
type
  > returned by the operating system will be wrong, and the incorrect DLL 
will be
  > called by CHKDSK.  This should not occur if the partition is correctly
  > formatted by Warp Server with HPFS386 correctly installed.
MB> I certainly do not recommend running HPFS386 "unofficially" in this way.
   Mike, if you ever decide to hit the lecture circuit, I'll be the 
   first to buy tickets. I've gleaned an amazing assortment of 
   useful information on a wide variety of subjects, just by reading 
   your posts in this echo...thanks for being such a resource!
                                       LRA
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