| Click here to select a new forum. |
| Weird: floppy disk not recognized by Finder |
Posted by: MikeatOSX on 2021-01-03 08:24:08
My PowerBook 170 has a weird floppy problem:
the PB can boot with any fitting floppy disk - even with system 6.0.8 disk from Macintosh garden.
When I boot with it's hard disk and then put in a known good disk, Finder does not recognize, that there is a floppy disk: no sound, no floppy disk on the desktop. When I use Disk Copy and load a disk image, I can put in a disk which is written correctly and then ejected, like it should be.
It's only the finder which doesn't see the floppy disk.
I changed the floppy drive (still not the floppy drive cable):
same behaviour.
Any ideas please?
|
Posted by: MikeatOSX on 2021-01-03 12:15:54
Replacing the floppy drive cable did not help. 🙁
|
Posted by: MikeatOSX on 2021-01-03 13:07:09
omg!
It must be a software thing!
When I start with extensions OFF, floppy disks are recognized as usual by Finder !
I unscrewed the PB so often.....
|
Posted by: MikeatOSX on 2021-01-04 00:10:07
It's not so easy as I thought. I thought I'll solve this problem by de-activating several extensions and deleting several prefs in the prefs folder. No luck.
Only Disk Copy 4.2 when started is able to eject a non Finder recognized disk. And of course disks are still recognized by Finder when extensions are disabled.
Conflict Catcher checked all extensions and all are ok.
So I have to do more extension testing nevertheless. :O
|
Posted by: MikeatOSX on 2021-01-04 02:17:55
I finally found the solution!
In RamDoubler 2 readme file:
"68030-based PowerBook and Duo users with 8 MB RAM in System 7.5, may experience the following if in 24 bit mode:
a. the PowerBook won't go to sleep when you shut the lid
b. the physical buttons for the monitor backlight don't work
c. the floppy drive doesn't work
Solution: Install System 7.5 Update 2.0 which fixes these problems in 24 bit mode or turn on 32 bit addressing in the Memory Control Panel."
It's a very rare problem, which cost me hours of investigation.
When booting System 6.0.8 with floppy disk on a PowerBook 170 (or PB 140), the RAM memory is switched to 24-bit mode.
If you later boot from the hard disk System 7.5.5, this switchover is not reversed, but must be manually switched to 32-bit mode again in the memory control panel.
Then the floppy drive works. 🙂
|
Posted by: cheesestraws on 2021-01-04 02:36:09
Wow. What a nasty problem. Well solved 🙂
|
Posted by: MikeatOSX on 2021-01-04 02:43:19
True.
I even changed the interconnect board. :-(
But I also changed the cover with the broken hinge mounts.
So this PowerBook looks like new now. 😉
|
| 1 |