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From: lucio@mi.iasf.cnr.it
Subject: [Data] accessing XMM CD on Linux Suse
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Date: Tue, 23 Aug 2005 08:22:50 GMT
From: lucio@mi.iasf.cnr.it
To: xmmhelp@xmm.vilspa.esa.es
CC: lucio@mi.iasf.cnr.it
Subject: [Data] accessing XMM CD on Linux Suse
Full_Name: Lucio Chiappetti
Submission from: (NULL) (155.253.16.88)


I had the following problem mounting an old XMM CD onto the DVD drive of a new
HP Compaq dc7100 running Linux Suse 9.2. I have been able to use the CD OK
previously
on other Unixes (Alpha, Solaris).

if I mount the CD by default (using the default fstab entry) I get lowercase
filenames, and the SAS complains with e.g.
'The directory `/media/dvd/odf' does not appear to contain an ODF -
 did not find the summary file which ends in "SUM.ASC" or "SUM.SAS"'
or
'error (NoOdfFound), No valid ODF found in /media/dvd/odf'
or other errors related to the fact names are seen in lower case.

if I mount the CD manually with
 mount -t iso9660 -o map=off /dev/dvd /media/dvd
I get all uppercase names, but they include the version number
e.g *_M1S00100AUX.FIT;1 and are still unusable by SAS

if (as documented in
http://xmm.vilspa.esa.es/external/xmm_data_acc/xmm_cds_frame.shtml)
I mount as 
 mount -t iso9660 -o check=r /dev/dvd /media/dvd  
I see lowercases names, but contrary to what documented in the PDF
document, still SAS fails to recognize them.

I also tried various combinations based on my SuSE "man mount"
like map=off,check=r, or adding "norock" to the options, or using a 
non-fstab mount point mimicked on the fstab entry 
mount -t subfs /dev/dvd /mnt -o fs=iso9660,check=r,ro
but all at no avail. Apparently Linux SuSE has not a "-noversion" 
switch like some other unixes had.

For documentation I enclose the default fstab entry for the DVD drive
/dev/dvd /media/dvd subfs
fs=cdfss,ro,procuid,nosuid,nodev,exec,iocharset=utf8 

If you have a clue, it would be useful to update the PDF document quoted
above (it dates 2001, I suspect "subfs" is newer and may interfere, but
I'm not an expert, it's a new feature even for me).

I still think it's a good thing to be able to work off a CD without
copying the stuff on disk (which would imply a rename anyhow).

So far my own workaround was to provide a directory with soft links
mkdir FakeODF
cd FakeODF
foreach i (/media/dvd/odf/*)
 set a = `echo $i:t | tr '[a-z]' '[A-Z]'`
 ln -s $i $a
end 
and repoint SAS_ODF to such FakeODF directory.

A similar workaround could be used to copy instead of linking.


Reply 1

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From: Matteo Guainazzi <xmmhelp@xmm.vilspa.esa.es>
To: lucio@mi.iasf.cnr.it
Subject: Re: [Data] accessing XMM CD on Linux Suse (PR#19173)
Date: Tue Aug 23 08:59:05 2005
Dear Lucio,

 thanks for your detailed analysis. The problem will be analysied by the
computer experts here locally, and the document updated accordingly.

 It goes without saying that the best workaround is to get the ODF directly from
the XSA, either from the applet user interface
(http://xmm.vilspa.esa.es/external/xmm_data_acc/xsa/index.shtml), or via batch
scripts through the Archive Interoperability System
(http://xmm.vilspa.esa.es/external/xmm_news/news_list/xmm_news-2003-04-07.shtml).
Although ODFs have been very rarely changed, for some old ODFs an improvement in
the attitude reconstruction has been achieved in the course of the mission, and
yielded an improved attitude history file.

 Would you need any further clarifications, please do not hesitate to contact us
again.

 Regards,

 Matteo

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