That would not work because you have to boot from the Mac OS 9.1 install CD if the installed Mac OS version is < 8.5. If you still try you get an error message saying that the system cannot run the installer.
BTW, I was wrong with my second sentence. The 6100 does not even see the third-party CD-ROM drive - with one exception: if I boot with command-option-shift-delete (= boot from external drive) it reads the CD but ends with a floppy-with-question-mark symbol. Other than that it does not see the drive. I made the Jaz copy on another Mac.
So it seems I have to find an Apple-supported CD-ROM drive or manage to hack the Jaz copy of the install CD so that it boots.
BTW, I was wrong with my second sentence. The 6100 does not even see the third-party CD-ROM drive - with one exception: if I boot with command-option-shift-delete (= boot from external drive) it reads the CD but ends with a floppy-with-question-mark symbol. Other than that it does not see the drive. I made the Jaz copy on another Mac.
So it seems I have to find an Apple-supported CD-ROM drive or manage to hack the Jaz copy of the install CD so that it boots.