corrupted floppies

[Dan Bethe <dtm@netcomi.com>]

Hi there.  I'm having trouble with corrupted floppies.  I have a ROM01
//gs with 1280K RAM, a vulcan 20 meg IDE drive, an 800K apple floppy
drive, and GS/OS 6.0.1 freshly installed.
	My Linux pc is connected to the Internet and I have a Mac and the //gs
sitting unconnected.  The Mac 7500 with its Superdrive floppy, is my
FAT-to-ProDOS utility.  Before I got my Apple color RGB monitor, I was
going to use its RGB video digitizer card as a //gs monitor!  ;->
	Do you guys have any suggestions?  I wonder if the Mac is adding
garbage to these files?  But why would PC Exchange behave in this way
with floppies that all my systems analyze just fine?  All of these files
were downloaded from known working sites that I collected from this
newsgroup, such as http://ground.isca.uiowa.edu/apple2 but the story's
always the same.  Please send all responses to email, as I might lose
this in csa2!  Then all your typing will be wasted  :-/  Thanks very
much for your time!
	Here's my story:

FORMATTING DISKS
================
* in the linux pc, i insert double-density (not modified high density)
floppy and run 'fdformat /dev/fd0H720'.  it low level formats and
verifies ok.
* using ProDOS floppies initialized in //gs Finder, or with MacOS.  all
floppies have been low-level verified 'ok' on Linux, GS/OS, and MacOS
* I download apple // files to Linux pc.

MOVING APPLE // FILES TO FAT FLOPPY
===================================
* use 'mformat' and 'mcopy' to format the floppies to 720K FAT (DOS
formatted), and copy GS files to it

MOVING APPLE // FILES FROM FAT TO MAC
=====================================
* run across the building to the Mac, copy files to Mac hard drive

MOVING APPLE // FILES FROM MAC TO PRODOS
========================================
* copy files from Mac hard drive to ProDOS 800k floppies
* usually I can copy a few hundred K of data and it's as slow as
Christmas.  PC Exchange on MacOS (the control panel that allows FAT and
ProDOS disks) moves at about 8k every 5 seconds.  after a few hundred K,
all additional files will result in a cryptic error.  can't copy any
more.

USING THESE FILES ON //GS
=========================
* take my ShrinkIt files on these ProDOS disks over to //gs
* .BXY files appear in GS/OS Finder with the Shrinkit archive icon
* GS-ShrinkIt 1.1 won't deal with these .BXY files though, claiming that
it's not a known archive.
* virtually all of these files can't be copied to my hard drive with the
Finder.  it'll work for a while, then start an endless loop between
"reading" and "writing" -- the copy dialog box just says
reading/writing/reading/writing/reading/writing really fast forever.
* sometimes I can start GS-Shrinkit and unpack from the floppy to the
hard drive just fine.