Disk Copy errors when imaging 400k Floppies

[olePigeon]

So I was making some backups of more of my software, and started working on MacTerminal.  It's 400k floppies in that older format (not HFS, the older one I can't remember).  My IIci can read them, but I can't write to them.

Both Disk Copy 4.2 and 6.3 will read the floppy and save an image just fine, however, they always get a -43 error after mounting.  The error says the checksum is VALID, then mounts it anyway.

I'm just worried that the disk image is still broken somehow.  Has anyone run across this?  Could it be copy protected?  I've never run into copy protected Macintosh floppies before, and Google hasn't helped much.

I know that Copy II Mac can do byte, sector, and all sorts of other nifty ways to copy a disk, but I'd like to save it as a disk image.

 

[Unknown_K]

Don't you need an older 800k drive for doing that?

 

[olePigeon]

Do I?  Didn't occur to me to try.  I'll attach my 800k drive to the floppy port and give it a whirl.

 

[gsteemso]

I will be interested to see if that works. I know 400KiB Lisa disks used 536-byte sectors, with 24 invisible “tag” bytes used by the OS per sector, and that versions of Disk Copy after 4.2 silently discard that extra information, but I have no idea whether MFS (the original flat Macintosh File System, which faked the existence of folders by encoding an entire directory path into every filename, and allowed file & folder names to have up to 63 letters) made any use of that data space. Even if it did, shouldn’t a SuperDrive still be backwards-compatible? Now you have me very curious to know!

 

[olePigeon]

Same error.  The 800k drive was much faster at reading a 400k floppy than my 1.4MB drive, but the end result is the same.  I can't write to the floppy no matter what, be it an 800k or 1.4MB drive, and the resulting image still generates a -43 error when mounting (though, it still mounts.)

 

[gsteemso]

Wait… what system version are you using? I am 90% sure that at some point in the System 7 days, write support for MFS was removed. That might be the missing file that -43 error is in reference to, for all I know.

 

[Gorgonops]

Wait… what system version are you using? I am 90% sure that at some point in the System 7 days, write support for MFS was removed.

7.6.1 according to the interwebs.

 

[olePigeon]

I'm running 7.1.1 Pro.

 

[Elfen]

Excuse me.... my memory might be faulty with this.

System 7 can read but not write to a Mac 400K disk in MFS on a 68030 Mac with a Super or HD Drive. This includes the SE\30, Mac SE with Super or HD Drive (even though it is not a 68030 Mac), and the Mac II series.

System 6 can read and most of the time write a 400K MFS disk but only off the drive is a 800K Drive and not the 1.4M Super or HD Drive. This improves when you are using Mac 512K, Mac Plus or Mac SE. Even a Mac II with 800K drives it will work most of th time.

I think it is something to do with the Super Drive and the SWIM. I just can't remember the exact reasons for it.

 

[olePigeon]

OK.  I'll try installing System 6 and see how it goes.