[daip] moving old AIPS files to new machine

Jennifer Donovan jen at astro.columbia.edu
Sat Jan 9 00:05:05 EST 2010


Hi AIPS experts,

I have recently gotten a new computer (a MacBook Pro running OSX 10.6.2),
and so I have moved all of my old AIPS files from the old machines (a
Linux box running Ubuntu 6.06 and a PowerBook G4 running OSX 10.3.9) to
the new one. I just upgraded AIPS to 31DEC10.

I was able to configure the data directories to point to the old data
files, and the files created on the Linux box work fine. The files created
on the older Mac, however, give this error when I try to list the
directories:

>ind 7
>mc
AIPS 1: Catalog on disk  7
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  7
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)

Is there a way to recover this data?

I did some poking around through the archives of AIPS advice from this
group in trying to answer this, and I found a very scary message from Eric
Greisen warning someone against a similar-sounding situation with a mixing
of data from an SGI and a Linux box. Apparently if the "endianness" of the
machines are different, they could actually destroy each other's data...?
Both my new machine and the Linux machine are Intel-compatible, but the
older Mac used a PowerPC processor. Until I hear differently, I have
deleted all of the data created by the older Mac from the new machine --
but is there another way to be able to recover this data without having to
read everything out as .fits files?

Thanks so much,
Jennifer Donovan Meyer




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