[daip] tape error (aips)

[Eric Greisen]

Pedro Manuel Augusto writes:
 > 
 > Dear Eric,
 > 
 > > After you log in to "astro", the tape drive is local to astro not
 > > "remote".  So you can set REMHOST = ' ' and mount the tape and that
 > > should work.  Of course, when you then run FITLD, the data will be
 > > loaded onto your data areas on astro rather than on your desktop.
 > 
 > This is not possible, however, since "astro" has no AIPS installed.  
 > (this is a unique situation where I am alone - no Unix or Astronomy
 > experts - in this island and University trying to install AIPS somewhere;
 > after years of fight I decided that at least on my PC I should be capable
 > of doing it;  with help, of course) 

     With no AIPS on astro there can be no remote tape.  Assuming that
the tapes are on astro, then astro must run the AIPS program TPMON as
a daemon process to talk to the AIPS on whatever other computer runs
aips.  It would appear to me that you must use dd to copy the tape, 1
file at a time to disk.  Then ftp the files to the computer that runs
AIPS and set INFILE to point at the dd/ftp'd file.  AIPS can write out
the data to OUTFILE in FITTP and the process may be reversed.  The
BLKSIZE is 28800 bytes usually on FITS tape files.


 > In this past week I have been trying lots of things, still without
 > success. I have noticed that a SSH connection is vital to get the Tape
 > deck working properly remotely on "astro" with the AIPS on my machine (and
 > from my machine). However, astro does not have SSH installed and my
 > attempts to do it failed. After a long email dialog with Openssl, Openssh
 > people, it seems rather difficult to get this working properly here.
 > However, telnet works fine from my machine to "astro". Since there are no
 > security problems (both  machines protected from the outside world by a
 > firewall), is it possible to use telnet for the connection from AIPS? How
 > can I change this? I have also considered the possibility of bringing the
 > tape deck over here but, unfortunately, it is Sun-only compatible and I
 > have a PC.
 > 
 > > 
 > > If you want the data on, say MYHOST, then login to MYHOST and
 > > 
 > >        aips tp=TPHOST                  starts TPMONs on TPHOST - the
 > >                                        machine that has the real tape
 > >                                        devices)
 > >        REMHOST=' '; TAPES              to see the MYHOST tapes list
 > >        INTAPE = n                      where n is a REMOTE TAPE locally
 > >        REMHOST='TPHOST'; TAPES         to see the list of tape devices
 > >                                        on TPHOST
 > >        REMTAPE = m                     device wanted
 > >        MOUNT
 > > 
 > > The second problem is more serious but easily solvable one hopes.  For
 > > security reasons the TPMONs examine a file $NET0/TPHOSTS which gives
 > > the names of computers which are allowed access.  These names can be
 > > in numerous forms - try
 > > 
 > > *.uma.pt
 > > 
 > > or if you get desperate
 > > 
 > > *
 > > 
 > > which should let the world access your machines.  The REMOST='ASTRO'
 > > on astro should have worked even though is was not needed and I
 > > suspect that whatever is in your TPHOSTS file would not accept astro.
 > 
 > Did all that but found the more severe SSH problem I described before.
 > 
 > > Congratulations on all your progress.
 > 
 > Thanks. I would never have got this far without your help.
 > Regards,
 > 
 > Pedro
 > 
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