Macintosh Classic Issue - floppy disks not working in OS 7.X (Working in 6.0.7)

JohnnyPhantom

New Tinkerer
Aug 31, 2022
35
4
8
Hey Everyone.

I recently got a Macintosh Classic (I'll post photos soon) that I took apart, and restored (cleaned up, new caps, repaired drive (for now, soon will be a Blue SCSI once the parts arrive from Mouser) cleaned and re-lubed floppy drive, etc. Has the 4MB of RAM upgrade, original mouse, keyboard, power cable, and a Targus carrying bag. I love it so much!

Here's the issue, the floppy drive works, I've created several new system install disks using my Windows XP PC and OmniFlop. If I boot and install OS 6.0.7, i can wipe the drive, install the OS, boot to desktop, pop in another floppy, open the disk and play the game (or whatever the floppy is).

If I load anything OS 7 it seems (tried 7.0, 7.1, 7.5.0, and 7.5.3) I can install the OS, but now any floppy disks no longer work when booted to the desktop. I pop them in, nothing mounts, nothing happens. if I force the floppy out with a paperclip, I'll get a "unrecognized disk" error message.

The issue was the same with the original SCSI drive as well as when I replaced the drive with a BlueSCSI

I tried with both a wipe of the drive and a fresh install of System 7.X as well as upgrading from 6.0.7 to 7.X, seems to behave the same

Is there an extension I need to enable? or something I'm missing? Not sure if it matters, but the machine has no PRAM battery installed. Also, not sure if there's a better way to do this, but when I install OS 7.X, I first boot the 6.0.7 system disk to erase the SCSI drive, then reboot, and then load the 7.X install disk 1 and install on a freshly wiped SCSI drive. Is there a better way to wipe the disk and install 7.X?

(Growing up I started with a G4 PowerMac with OS 8.6 and went up from there, became a Apple Authorized Tech, and serviced hundreds of Macintosh machines, but never had a or used 68K or OS 6/7 machine until a few weeks ago, So it's possible I'm missing something)

Thanks everyone in advance for all your help on this!
 

Mierza

New Tinkerer
Mar 26, 2024
1
0
1
I ttthhhiiinnnkk I'm getting closer. I'm at the point now in 7.5.5 where I can insert a floppy (even the ones that didn't work before in OS 7.x I created) and they will mount and read now, but when I eject them, the disk icon stays on the desktop and just kinda grays out. going to try wiping the hard drive/bluescsi and install a fresh install of the OS and see how it works then.
Hi
I have exactly same issue
How do you solve it?