[daip] aips disk access problem

[Eric Greisen]

Chip Kobulnicky writes:
 > Hi,
 > 
 > I'm experiencing a problem reading data from aips disks.  
 > 
 > I have two machines, an SGI and a linux redhat 7.3 machine which
 > each have working aips installations and I'm having trouble sharing
 > disks between them...I think.  I've had the SGI for many years, and all
 > my data was processed and is visible from the SGI when I run aips.  The
 > problem comes when I try to access the same aips disk areas from my
 > linux machine.  I have the disks commonly mounted and accessible to both
 > machines (defined in DADEVS.LIST and NETSP and linked properly in
 > DATA/), and when I start up aips on linux, things look normal and
 > aips finds the disk areas ok.   I enclose the startup messages below.
 > 
 > But when I try to look for my data files which I see fine on the SGI I
 > get

   I suggest that you stop doing this immediately.  You will be luck
not to have destroyed your data.  The SGI is a big-endian machine and
Intel Linux boxes are little-endian machines.  This means that they do
not have the same binary format for integers or floats and all aips
disk files are structures of all floats or a mix of integer, single
and double precision floats and characters.  Using a catalog file for
an SGI from a Solaris box can effectively delete all the data.

 At the AOC we call these two architectures different "SITE"s -
NRAOAOC for Solaris and SGI (which can share data) and COAOARN for
Intel Linux.

Eric Greisen

 > 
 > > indi 2
 > > mc
 > 
 > AIPS 1: Catalog on disk  2
 > AIPS 1:    Cat Usid Mapname      Class   Seq  Pt    Last access     Stat
 > AIPS 1: ZFIO: OPER = READ LUN = 15 NREC =        6
 > AIPS 1: ZFI2: REQUEST FOR BYTES 5121 THRU = 6144 BEYOND EOF = 5120
 > AIPS 1: ZERROR: IN ZFI2   ERRNO = 22 (Invalid argument)
 > >uc
 > AIPS 1: Catalog on disk  2
 > AIPS 1:    Cat Usid Mapname      Class   Seq  Pt    Last access     Stat
 > AIPS 1: ZFIO: OPER = READ LUN = 15 NREC =        6
 > AIPS 1: ZFI2: REQUEST FOR BYTES 5121 THRU = 6144 BEYOND EOF = 5120
 > AIPS 1: ZERROR: IN ZFI2   ERRNO = 22 (Invalid argument)
 > 
 > What is this a symptom of?
 > 
 > If it helps, the linux aips is 31DEC02 and the SGI version is 15APR99.
 > 
 > Thanks if you have some clues,
 > Chip
 > 
 > 
 > 
 > 
 > 
 > [chip at zima ~]$ aips
 > START_AIPS: Your initial AIPS printer is the Postscript Printer in
 > ps204c 
 > START_AIPS:  - system name printpress, AIPS type PS
 >  
 > START_AIPS: User data area assignments:
 > DADEVS.PL: This program is untested under Perl version 5.006
 >   (Using private file /d/hak/hak/.dadevs for DADEVS.PL)
 >    Disk 1 (1) is /d/aipsroot/AIPS/DATA/ZIMA_1
 >    Disk 2 (2) is /d/aipsroot/AIPS/DATA/ZIMA_2
 >                   /d/aipsroot/AIPS/DATA/ZIMA_3 is currently unavailable.
 >    Disk 3 (3) is /d/aipsroot/AIPS/DATA/ZIMA_4
 >    Disk 4 (4) is /d/aipsroot/AIPS/DATA/ZIMA_5
 > 
 > Tape assignments: 
 >    Tape 1 is (no description provided by installer yet) on ZIMA
 >    Tape 2 is (no description provided by installer yet) on ZIMA
 >    Tape 3 is REMOTE
 >    Tape 4 is REMOTE
 >  
 > START_AIPS: I am GUESSING you are at a workstation called zima
 > TVDEVS.SH: Starting TV servers on zima asynchronously
 > TVDEVS.SH:  - with Internet Sockets...
 > TVDEVS.SH: Starting TPMON daemons on ZIMA asynchronously...
 > Starting up 31DEC02 AIPS with normal priority
 > Begin the one true AIPS number 1 (release of 31DEC02) at priority =   0 
 > AIPS 1: You are assigned TV device/server   1
 > AIPS 1: You are assigned graphics device/server   1
 > AIPS 1: Enter user ID number
 > ?DADEVS.PL: This program is untested under Perl version 5.006
 > XASERVERS: TVSERV is already running on host zima, user chip
 > XASERVERS: XAS is already running on host zima, display :0.0, user chip
 > XASERVERS: TEKSRV is already running on host zima, display :0.0, user
 > chip
 > XASERVERS: MSGSRV is already running on host zima, display :0.0, user
 > chip
 > 1708
 > AIPS 1:                          31DEC02 AIPS:
 > AIPS 1:      Copyright (C) 1995-2002 Associated Universities, Inc.
 > AIPS 1:            AIPS comes with ABSOLUTELY NO WARRANTY;
 > AIPS 1:                 for details, type HELP GNUGPL
 > AIPS 1: This is free software, and you are welcome to redistribute it
 > AIPS 1: under certain conditions; type EXPLAIN GNUGPL for details.
 > AIPS 1: Previous session command-line history recovered.
 > AIPS 1: TAB-key completions enabled, type HELP READLINE for details.
 > AIPS 1: Recovered POPS environment from last exit
 > 
 > 
 > 
 > -- 
 > Henry A. (Chip) Kobulnicky    email: chipk at uwyo.edu
 > Dept. of Physics & Astronomy  phone: 307-766-2982 
 > University of Wyoming         fax  : 307-766-2652 
 > Laramie, WY 82071             http://physics.uwyo.edu/~chip
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