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| Author | Mac Classic - Writing System 7 Floppys (Read 23347 times) | ||||||||||||||||||||||||||||||
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skingaby
4 MB  Posts: 4 
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on: January 02, 2010, 00:31
recently got back in my possession a Mac Classic that I originally owned back in the early 90's. The only other Mac I have is running Snow Leopard 10.6. I want to update the Classic from System 6 to System 7 and so need to burn a set of floppys. Snow Leopard no longer has write support for the HFS file system so I cannot use it to burn the floppys. It will read HFS but not write. I have found the following applications that can burn HFS 1.44 floppys on MS Windows/DOS: Transmac, rawrite and fdimage. I have been successful in writing simple files to floppys and then reading them on the Mac Classic with all three of these applications. So far so good. The problem I have is that when I try to create the image files for system 7 on a 1.44 floppy I get an error message saying that the file is too big for the floppy. Actually after some investigation I have found that the system 7 files are 37 bytes too big to fit on a floppy. I get the same result will all three software products. Can anyway throw any light on this for me. BTW - I believe that the Classic will run System 7.0 but not System 7.5 and above? Steve |
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Anonymous Freak
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32 MB Posts: 37
Reply #1 on: January 02, 2010, 05:36
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The Classic will run up to 7.5.5. And I thought I had 'burned' 1.4 MB disk images in 10.6 before. Let me try real fast... Well, whaddaya know... It won't do it... Very odd, it won't let me even select the floppy as a restore target device, much less restore the image file.
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skingaby
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4 MB Posts: 4
Reply #2 on: January 02, 2010, 08:46
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Apparently they have taken HFS support out of Disk Utility. You can read HFS but not Write. Steve
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DaveRhodes
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32 MB Posts: 43 
Reply #3 on: January 02, 2010, 19:51
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I highly doubt that, restoring an image to a disk shouldn't be affected by the contents of the image. but if Disk Utility won't work for you, you can always use dd, the command line disk copy utility. I'll post instructions once I can dig out my floppy drive.
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skingaby
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4 MB Posts: 4
Reply #4 on: January 02, 2010, 20:43
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Thanks Dave - that would be greatly appreciated Steve
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DaveRhodes
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32 MB Posts: 43
Reply #5 on: January 04, 2010, 05:20
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Ok, maybe I believe you now... not only is Disk Utility throwing strange errors when I attempt to restore a disk image (the Disk Tools 1 floppy image from this site) (though it will let me go through all the motions, it just gets upset when I actually try to do it), but dd keeps getting "Operation not supported" when it tries to dump raw data to the drive. however, what I'm trying to do was apparently done successfully by this blogger: http://the-penciler.blogspot.com/2009/10/of-floppy-disks-hfs-and-snow-leopard.html However, if your Mac is as finicky as mine and refuses, a PC can be used to make a Mac floppy image. It shouldn't matter what the file system of the image is or if the computer knows how to read it. It only matters that the computer can dump the raw data to the disk, which is what dd does. If you have a Windows machine, I'm not sure how to go about restoring floppy images, but I'm sure it can be done. If you have a linux based machine, then you can use dd on there as well. Ah, hmm, but the floppy images may be compressed. Your Mac should still be able to make images of HFS volumes though, so if that's the case, mount the image and use Disk Utility to make an uncompressed copy... then dd should be able to dump the raw image onto a floppy and all should be well.
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DaveRhodes
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32 MB Posts: 43
Reply #6 on: January 04, 2010, 05:39
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on a related note, I wonder what error -123 is... that's what Disk Utility is throwing at me when I try to restore... even after converting the image to an uncompressed DMG. Sounds like something that would come out of John Hodgeman's mouth in the I'm a Mac commercials, Apple, here's glaring at you. A quick search reveals: wrgVolTypErr (-123): Wrong volume type error Ah. Carbon Copy Cloner is affected by the same problem. This could be serious.
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skingaby
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4 MB Posts: 4
Reply #7 on: January 04, 2010, 12:28
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Thanks - I'll investigate the link. As I mentioned in my initial post I have tried to do this on a PC (Transmac, FDimage and Rawrite but always get an error saying the file is 37 bytes too large. Steve
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