[GRASSLIST:660] off topic: backing up huge mapsets

Hi all,

I know this is off topic but probably some of you had experienced this problem as well. I have a very large mapset (19 GB) which is not compressed by using bz2 (the final tar.bz2 file was 17.2 GB). I have a backup of this mapset on an USB hard disk but I would like to create another copy in a couple of double layer DVDs (I don’t want to take any chances with the data that I have). Does someone know how to create three smaller files which I can later burn on separate DVDs?

thanks,

Jaime


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On Tue, 11 Apr 2006, Jaime Carrera wrote:

I know this is off topic but probably some of you had experienced
this problem as well. I have a very large mapset (19 GB) which is
not compressed by using bz2 (the final tar.bz2 file was 17.2 GB).
I have a backup of this mapset on an USB hard disk but I would
like to create another copy in a couple of double layer DVDs (I
don't want to take any chances with the data that I have). Does
someone know how to create three smaller files which I can later
burn on separate DVDs?

If you just want to chop the file up in a way that you can put them
together later to play with it (each segment won't be usable as-is),
then use either the Unix "split" command or the "dd" command. You
can specify how many bytes to split at. See the man pages for each.

--
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"Lotto: A tax on people who are bad at math." -- unknown
"Windows: Microsoft's tax on computer illiterates." -- WE7U
"The world DOES revolve around me: I picked the coordinate system!"

tar --help:

  Device selection and switching:

   -f, --file=ARCHIVE use archive file or device ARCHIVE
       --force-local archive file is local even if has a colon
   -F, --info-script=NAME, --new-volume-script=NAME
                              run script at end of each tape (implies -M)
   -L, --tape-length=NUMBER change tape after writing NUMBER x 1024 bytes
   -M, --multi-volume create/list/extract multi-volume archive
       --rmt-command=COMMAND use given rmt COMMAND instead of rmt
       --rsh-command=COMMAND use remote COMMAND instead of rsh
       --volno-file=FILE use/update the volume number in FILE

... so options -L and -M should be what you are looking for?

Benjamin

Jaime Carrera wrote:

Hi all,

I know this is off topic but probably some of you had experienced this problem as well. I have a very large mapset (19 GB) which is not compressed by using bz2 (the final tar.bz2 file was 17.2 GB). I have a backup of this mapset on an USB hard disk but I would like to create another copy in a couple of double layer DVDs (I don't want to take any chances with the data that I have). Does someone know how to create three smaller files which I can later burn on separate DVDs?

thanks,

Jaime

__________________________________________________
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--
Benjamin Ducke, M.A.
Archäoinformatik
(Archaeo-Information Science)
Institut für Ur- und Frühgeschichte
(Institute of Archaeology)
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Johanna-Mestorf-Straße 2-6
D 24098 Kiel
Germany

Tel.: ++49 (0)431 880-3378 / -3379
Fax : ++49 (0)431 880-7300
www.uni-kiel.de/ufg

If you are on windows then have a look for 7zip http://www.7-zip.org/

cheers
Wolfgang

Benjamin Ducke schrieb:

tar --help:

Device selection and switching:

  -f, --file=ARCHIVE use archive file or device ARCHIVE
      --force-local archive file is local even if has a colon
  -F, --info-script=NAME, --new-volume-script=NAME
                             run script at end of each tape (implies -M)
  -L, --tape-length=NUMBER change tape after writing NUMBER x 1024 bytes
  -M, --multi-volume create/list/extract multi-volume archive
      --rmt-command=COMMAND use given rmt COMMAND instead of rmt
      --rsh-command=COMMAND use remote COMMAND instead of rsh
      --volno-file=FILE use/update the volume number in FILE

... so options -L and -M should be what you are looking for?

Benjamin

Jaime Carrera wrote:

Hi all,

I know this is off topic but probably some of you had experienced this problem as well. I have a very large mapset (19 GB) which is not compressed by using bz2 (the final tar.bz2 file was 17.2 GB). I have a backup of this mapset on an USB hard disk but I would like to create another copy in a couple of double layer DVDs (I don't want to take any chances with the data that I have). Does someone know how to create three smaller files which I can later burn on separate DVDs?

thanks,

Jaime

__________________________________________________
Correo Yahoo!
Espacio para todos tus mensajes, antivirus y antispam ¡gratis!
Regístrate ya - http://correo.espanol.yahoo.com/