Communications between 3B2 and Sun via afio

[Leslie Mikesell]

In article <1961 at cs.rit.edu> sys-jdf at cs.rit.edu (John D Fulreader) writes:

>	I am having problems using afio when archiving data across a network.
> I am attempting to write from an AT&T 3B2 600 running System V 3.2.1  onto a
> reel to reel tape device physically mounted on a Sun 3/280 running SunOS
> 4.0.3.
> TCP/IP is used across an Ethernet network. When attempting to read an archive,
> spurious "BAD MAGIC NUMBER" errors occur. The archive can be read on the local
> Sun so the archive file is not corrupt.  The problem arises when the 3B2 reads
> the archive off the pipe.  

The BAD MAGIC NUMBER would only occur when the cpio header for an archived
file appears not to be correct.  Chances are that other errors are also
occuring in the data stream.
Afio simply generates an "rsh" command to build a pipe to another copy of
afio running on the remote system handling the device.  Chances are that
your rsh is broken.  You might test it with some other commands that move
a large amount of data.  Otherwise the blocking info is not being passed
correctly to the remote command.  You should be able to check how the command
was passed with a ps -ef on the remote machine while it is running.

Les Mikesell
  les at chinet.chi.il.us