Using a GS hard drive w/ a Mac

[danb@pro-newton.cts.com (Dan Brown)]

I have a Quantum 240 meg drive on my GS that I'd like to use with a Mac as
well.  On the GS, I'm using it with a Rev. D, v3.00j RamFAST SCSI card. 
Here's what I've tried so far:

1.      Formatted and partitioned the drive with the RamFAST's built-in
utilities. 6 32 mb ProDOS partitions, the remainder (about 42 meg) for HFS. 
Attach it to a Mac, no dice.  Since this is not surprising, started up
SilverLining v5.5 and attempted to install the Mac driver.  After completing
about half of the drive, SilverLining declared that it could not install the
necessary software.  It also scrambled the partition map, losing all the data
on the drive.  Not a good thing.

2.      Formatted and partitioned the drive with Advanced Disk Utilities v1.2
(the one that comes with System 6.0.1).  Same partition structure as above. 
Attached it to a Mac, which again would not read the HFS partition, which
again was not surprising.  Again, fired up SilverLining, and installed the
driver with no reported problems.  The volume mounted and worked perfectly on
the Mac.  Got home, attached it to the GS, and it said the first 6 partitions
were empty (and unformatted).  Again, data's gone.

        This is getting rather frustrating (to put it mildly).  What should I
try to get this to work reliably, including being able to boot from this
drive?  Many thanks, appreciation, and undying gratitude to anyone who can
help with this!

 ----------------------------------
Dan Brown, Sysop of pro-newton     Internet: danb@pro-newton.cts.com
 Above opinions are not those of Mensa, which has no opinions.
  GO D++ P+/-P+ C++ L+.5 M++ S+ G+- W+ T R-