🚀 go-pugleaf

This problem, in one form, was the subject in Ken Peterson's 
column in the Portland MUG (PMUG) newsletter:  Mouse Tracks.

Ken had prepared 25 work discs for PMUG's popular MacCamp, only
to find none of them worked on anyone's 512 Mac, even though he
had checked them out at home.  Subsequent experimenting and consultation
with some programmer friends produced some interesting observations.

He found that by using any of three copy programs on his 2MB Mac with
the new ROMs (I think he has a Levco MonsterMac as opposed to the Mac+),
if allowed to initialize the disks, produced copies unreadable on
512K Macs.

He and friends presume that the problem probably comes from the 
difference between how the old and new ROM sets call for 
initialization:  the copy programs call for nonspecific "Initialization"
when you select that option, whereas the new ROMs have two kinds,
one-sided MFS and two-sided HFS.  The default in the upgrade is
2-sided.  To quote Ken:  "So it appears the programs produced
copies initialized at two-sided but copied as one-sided and with
a directory or volume allocation structure the 512K Macs couldn't
recognize."

His solution: "Just use the Finder to initialize the disks as
single-sided and then use the programs without further initialization
 to make the copies."

The copy programs he used were:  MacClone 2.0, 512K Disc Copy (PD),
and Disk Copy (from DOP Q&DU, vol.2).