I found a program over in DL1 of the IBM Hardware Forum (GO
IBMHW) called INTRLV.ARC.  It contained two test programs for
testing the interleaving on your hard disk.

I found that with my SX running a Tandy 20 meg hardcard at an
interleave of 3 (what the auto-install program used), it took
17 revolutions to read a track.  Rather that use one of the
rewrite programs I read about here (since everyone said they
took about 12 hours to run), I made a complete backup using
PC Tools, and then I modified the auto-install program to
interleave at 4 instead of 3, re-formatted the drive, and
used PC Tools Restore to load everything back onto the
hardcard, followed by running the PC Tools Compress program.

The test program now says that it reads a track in 4
revolutions instead of 17.  And PFS: Professional Write loads
in 7 seconds as opposed to the 18 seconds it used to take.
And the PC Tools Compress program took about 8 minutes
instead of one hour.  A tremendous improvement.

I modified the auto-install program by preparing the blank
floppy as described in the manual but instead of running the
install batch file, I used my word processor to
remove the last line of the autoexec.bat file, that says
STAGE1.  I then ran the INSTALL program, but now it stops
after making the three batch files, and gives you a prompt.
I used my word processor to modify the file STAGE1.BAT so
that the line that normally reads:

LLFORMAT C: <\LLFORMAT.RSP

now reads:

LLFORMAT C:4 <\LLFORMAT.RSP.

I restarted the installation by typing STAGE1, and the auto-
install went through all of the motions except it set the
interleave to 4 instead of 3.

And the whole process took about 1 1/2 hours for 14 meg worth
of programs and data.

Rich