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From: schmid@jellosub.luftfahrt.uni-stuttgart.de (Georg Schmid)
Newsgroups: comp.sys.apollo
Subject: compress and 'rec'-files
Keywords: compress, rec, unstruct
Message-ID: <1990Sep12.190007@jellosub.luftfahrt.uni-stuttgart.de>
Date: 12 Sep 90 17:00:07 GMT
Sender: zrf80385@rusux1.rus.uni-stuttgart.de
Reply-To: schmid@jellosub.luftfahrt.uni-stuttgart.de (Georg Schmid)
Organization: Dept. for Statics & Dynamics of Aerospace Structures (ISD)
Lines: 50


At the ISD we have a Solid Modelling and Structural Analysis
package called I-DEAS from SDRC. This package ususally creates
output files of really ridiculous size (average 30 to 50 MB,
100 MB and more easily achievable). To save some disk space
I told the I-DEAS users to compress their output files (now
they're after me).

compress works really fine for the ASCII (Universal-) Files,
they get compressed up to factor 8. 

When compressing/uncompressing binary output files, I-DEAS
fails to read the uncompressed files (Wrong type).

Before compressing, /usr/bin/file shows, that the files are 
of type 'rec'. After compressing/uncompressing, the files 
areof type 'unstruct data'.  I-DEAS doesn't seem to like 
unstructured data.

The same thing happens when using wbak/rbak, so I couldn't 
restore the files from the latest backup tape.

At the german support center of HP/Apollo, I was told that 
the file type 'rec' is obsolete at SR10 (we are running 
SR10.2.p), and that there is no tool to convert from type 
'unstruct data' to type 'rec'.
At the german support center of SDRC, we were told that they
knew about the problem.
The tool '/com/cvt_rec_uasc' failed with 'Only disk files may 
be converted'  ??????

Does anybody know a way to restore the 'unstruct' files to 
type'rec' ? 

I guess there must be a way to open a file of type 'rec', 
probably by an AEGIS system call, because that seems to be
exactly what I-DEAS is doing. Perhaps it would be possible 
to copy the 'unstruct' files to newly created 'rec'-files? 
Unfortunately I'm not an AEGIS-programmer...

Any hints appreciated 

-- georg

_________________________________________________________________
Georg Schmid, ISD University of Stuttgart, W.-Germany                 
email: schmid@asterix.luftfahrt.uni-stuttgart.de (129.69.110.2)       
voice: +49 711-685-2053                                        
fax:   +49 711-685-3706
_________________________________________________________________