[comp.sys.mac] Some Floppies Won't Boot

ephraim@wang.UUCP (pri=8 Ephraim Vishniac x76659 ms1459) (12/03/86)

In Delphi digest volume 2, number 62, SYNTHONY bemoans his 
floppy-disk startup problems.  Because of the mentions of
contagion and of Multiplan, I think the problem lies in
the boot blocks.

In prehistoric times, the boot blocks were incompatible with
memory over 512K.  The boot blocks are rewritten whenever the
system file is copied to a disk, so that updating the system
normally updates your boot sectors.  BUT: If the system wasn't
updated by dragging in the finder, this doesn't happen.
Why Multiplan?  It's the only piece of Mac software I ever bought
that came with Finder 1.0!  Microsoft doesn't update things until
they're good and ready.

Fix: Drag the system from a working disk to a non-working and
it will spring to life.  Or, re-write your boot blocks with FEdit.