On Aug 11, 2011, at 3:34 PM, Doug McNutt wrote:
The clear cut fact is that I cannot mount a SCSI disk attached to
my SE/30 box, OS 7.5, on my G4 running OSx 10.4. It mounts nicely
using 10.3.9. The problem is that Apple discontinued the AppleTalk
over ethernet that is needed and AppleTalk over IP is not available
on the SE/30 without spending money on third party software,
Shareway. The term AppleTalk may be the wrong one. Perhaps AFP
over ethernet is more accurate. Some parts of AppleTalk are
supported to allow 10.4 to talk to older printers using ethernet.
To apply the OSI networking model, twisted pair cabling (for example)
would be the physical wiring (layer 1), and Ethernet is layer 2.
Layers 3 and 4 are either IP and TCP or AppleTalk (DDP and ATP, I
think). Layer 5 would be ASP (Apple Session Protocol), AFP itself
would be layer 6, and the actual application of file sharing would be
layer 7.
10.4 still supports parts of AppleTalk like NBP (Name Binding
Protocol) so you can see an OS X file server in the Chooser.
Unfortunately, AFP over TCP is flaky between OS 9 and OS X hosts in
either direction[1]: When I switched my parents from an OS 9 box to
a new iMac running 10.4, I resorted to burning a CD-R -- a form of
sneakernet -- to get files from one machine to another in the same
room. I probably would have had better success if the old machine
were running Windows.
It likely does mean that connecting to a port with TCP or plain IP
on a newer Mac than the G4 using ethernet on an SE/30 might be
difficult.
Nope, TCP applications will work just fine. (Provided the
applications aren't buggy, of course.) Sometimes I use HTTP to
transfer files from one box to another. MacRelix comes with htget
and httpd programs, so you can do this in either direction, with the
added benefits of not needing to wait for File Sharing to start and
not slowing OS 9 I/O performance to a crawl (as running the AFP
server does).
Josh
[1] Connections from OS X to OS 9's AFP/TCP server dropped
unexpectedly. Connections from OS 9 to OS X's AFP server persisted,
but some files were silently truncated.
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