Re: Where would this be appropriate?

[dempson@actrix.gen.nz (David Empson)]

Michael J. Mahon <mjmahon@aol.com> wrote:

> Jonathan Herr wrote:
> > "Roger Johnstone" <rojaws@orcon.net.nz> wrote in message
> > 20050724173820474+1200@News.Individual.NET">news:20050724173820474+1200@News.Individual.NET...
> > 
> >>In <PAEEe.585$8g.478@tornado.rdc-kc.rr.com> Jonathan Herr wrote:
> >>
> >>>I have a Macintosh LC II and I can get the images for MacOS 7 off of
> >>>apple's site... but how would I install it on a machine (without
> >>>putting it onto disks)  I only have a MacOS 9 machine to format disks,
> >>>and the LC machine doesn't seem to really like it when I format the
> >>>disk under MacOS 9.
> >>
> >>What exactly happens when you try to use a disk formatted on the newer
> >>Mac? I assume you have other disks which do work OK? Have you tried
> >>cleaning the disk heads with a floppy drive cleaner?
> > 
> > 
> > Sorry I wasn't clear on that point... The disk I was referring to was a
> > HardDisk and when format the disk (to wipe it) or if I try to install MacOS
> > 7 on the disk from within OS9, it tells me when i reboot with the newly
> > installed OS (MacOS 7) that the disk "Won't work on this mac" because it's
> > not formatted properly or something like that.
> 
> ISTR that the Mac installs a disk driver on the disk when it partitions
> it.  It's easy to believe that the driver installed by OS9 is not usable
> by OS7.

Newer Mac models have a more advanced SCSI manager (SCSI Manager 4.3),
which uses different drivers.  If the drive is partitioned with Apple's
Drive Setup on a PowerMac, it might only include drivers which work with
SCSI Manager 4.3 and/or a PowerPC processor.

To be on the safe side, you should use older software to partition the
drive, but you can run into compatibility problems with the software
refusing to work with drives other than its own brand (e.g. Apple's
older partitioning software only works on Apple-supplied drives).
Third-party generic software is the best option in this case.
-- 
David Empson
dempson@actrix.gen.nz