Os 9.1 install on g4 10.4.9 won't boot into classic

Question

I'm trying to install os9 onto the same partition as 10.4.9. I boot onto the os9 install disk, it installs just fine, will open in os9 just fine, but won't boot up in classic under 10.4. (sorry for the run on sentence)
I can get to the OS9 screen and then it stops before loading any extensions. I tried launching without extensions and that doesn't work either. I tried to update to 9.2.1 and it fails saaying there is a problem. I have done several clean installs of OS( but to no avail. Can you not install in reverse order? I was given this mac with 10.4 loaded so I don't have original disks for that. I hate to send it back to 10.3.9, I have those disks. Anyone have a suggestion? We still have a lot of OS9 programs we use and can't afford most of the upgrades to work strictly on 10. Thanks
Craig

Answer 1

Craig, I'm having a very hard time understanding your
cryptic posts. I can't even make out whether you're
all set now and don't need any further help, or
whether you're still stuck.
I grabbed a system folder from another system with
10.4 and 9.2.2 and this boots up just fine.
Sorry, bad terminology. The osx machine will now start up Classic with out a hitch (no problems). i haven't tried to boot into os9 yet. I could never get the International Install to ever work as Classic.
As did your old OS 9 installation, as did OS X. It
was starting Classic within OS X (which is not
"booting") that didn't work. Does it work now?
Is there anything in the international edition that
won't allow this to work?
It may be that you'd need to have OS X set to use
International English in order for it to cooperate
with an International English version of OS 9, but
I'm not sure about this.
I did notice a BTree error in os9, but disk utility
said it was fixed. Not. Kept me from upgrading the
9.1 to 9.2.2.
Does this refer to the old OS 9 installation, and is
this problem now gone?
I haven't looked to see if the BTree problem still exists. I'm guessing it's not there since Classic started just fine.
It also told me to do a clean install. It was a
clean install. Says it can't modify the system folder
on this mac.
When you perform a proper Clean Install of OS 9, the
installer renames the existing System Folder
"Previous System Folder" and unblesses it. These are
the only changes made to the old System Folder — but
if it has been selected for use by OS X to provide
the Classic environment, it can't be renamed.
That prohibition (which is imposed by OS X) may
flummox the old OS 9 installer, which was written
before there was any such prohibition and before
there was any OS X.
So with the OS 9.2.2 that you copied from another
Mac, are you able to run Classic again? The downside
of copying OS 9 from another machine is that if you
ever want to boot (start up the computer from a cold
shutdown) into OS 9, or restart into OS 9 instead of
OS X, it may not work. Unless specific steps are
taken during the installation of OS 9 (from a retail
disc only) to perform a universal installation
(which will start and operate any Mac that can run
that version of OS 9), every OS 9 installation is
tailored to the hardware of the machine on which it's
installed, or for which the model-specific installer
disc was designed. That generally means that if the
System Folder is copied to a machine with different
hardware, it will be problematical — failing to boot
at all, failing to run reliably, or lacking drivers
for hardware components in the machine to which it's
been copied. If you aren't able to boot into the
newly-copied OS 9.2.2 even though it functions as
Classic, this is probably why.
See above for most of these answers. I've been running Macs since the MAC PLUS and have done many clean installs since. This problem just had me stumped compared to all the other problems I've encountered over the years with many different Macs. I'm not a PC guy or Unix guy so the newer OS X stuff is still a learning curve for me. Was my question answered - not really (but international version OS 9 vs non international OS X may truly be the answer). Is the problem resolved? I think so. Thanks for all the suggestions.
Craig