Linux and amiga floppy images

["Kolbjørn Barmen" <linux-m68k@kolla.no>]

Hello!

I had a strange observation a few weeks ago that I intended to check with
you guys, but then forgot all about. :P

I was restoring some old amiga systems, and in that process needed to get
software onto floppies. I have a catweasel and can write out so called ADF
files (amiga floppy images) to floppies just fine with it (excellent
hardware). The problem I had was creating ADFs on linux, I assumes I could
just loopback-mount them with affs and just write files to them, but no -
I always ended up getting I/O-error, and the kernel put the filesystem
write-protected.

Deleting files seems to work ok, but once you try to write  a file, the
filesystem chokes, becomes write-protected and the resulting file is a
0-byte entry.

But I didnt give up there, I tried on different systems... much to my
amusement it worked fine on my linux/m68k systems - amigas, macs and
aranym alike!  OK, I thought, maybe endianness, so I tried on my ppc ibook
running linux - same failures as on the PCs. So - something is done very
correct on m68k in regard to affs, that isnt done correct on other archs.
Anyone know what that might be?

(All systems I tried with were running 2.6.2x, ubuntu, debian, gentoo)

Cheers!

-- kolla