🚀 go-pugleaf

I have a sick HD20. Can anyone suggest a possible solution for
these symptoms, short of "backup and reformat"? I apologise for posting
on a well worn subject, but I have tried the approaches suggested on
previous occasions (check boot blocks, use ***** Recover/ *** Tools etc) 
to no avail.
Thank you very much, Simon.

Symptoms
-------- On Startup my HD20 displays the Mac icon for a second or so
while trying to boot and then goes to the ? disk icon. (ie it wiil not
start up the machine. failure occurs during boot - before the Startup 
screen). 
The disk will mount normally when the Mac is started from a floppy, but
Command-Option-Double Clicking applications or the finder on the HD
does not change the "disk on top".

History
------- Upgrading system and finder left me with a corrupt system 
which caused a bomb as soon as Package 6 (IU) was needed (when Oasis 
started running). Fortunately, I was able use DAs to delete all systems
and finders I could find when it ran TMON (as part of my startup sequence
before Oasis). The disk would then log on when another disk was used
to startup, and I was able to copy good system and finder (3.3/5.4) over.
Now the problem is as described initially.

o the system was dragged onto the HD with Appleshare off, so new boot 
blocks should have been written.

o the disk verifies as ok under a couple of verify/recover tools.

o writing new boot blocks with FEDIT does not help.

o I have removed all init files (Jclock etc) from the system folder.

As the problem occurs in the boot phase and the Mac itself is healthy,
and the system on the HD is pristine and runs fine off floppies and
and XP40, it seems the problem ought to lie in the boot blocks,
but as I said above, I have written new ones (by dragging a system,
and by using FEDIT+). So, what can the matter be? 

That's the story. Thank you for reading this far. Any suggestions of
tools/approaches to try would be very much appreciated.

 			Simon Evans

Simon Evans 			 ISD: +61 2 90-7031 or +61 2 799-1696
c/o JAM Software Pty Ltd	 STD:  (02) 90-7031 or (02) 799-1696
27A Nowranie Street		 ACS: sce@runx.ips.oz
Summer Hill NSW  2130           UUCP: seismo!munnari!runx.ips.oz!sce
AUSTRALIA                       ARPA: munnari!runx.ips.oz!sce@SEISMO