Re: tar and the braindead man
On Mon, 26 Oct 1998, Anthony Landreneau wrote:
> Ok Kenneth,
> I must be missing something here, other than my mind of course. This is
> the requirment:
> I have a tape with a tar file on it, lets call it thefile.tar . I need to
> make two copies of that file, back on two other tapes. So I will have
> three tapes with three identical copies of this tar file.
Okay, so you dump the data to disk (tar xv <tarball>), and retar it to
tape (tar cvf <tar-dir> <tape dev>). But it looks like the data you got
off tape is a tarred archive -- so someone probably created the tarball,
and cat'd it onto tape -- or I could be wrong. ;)
To cat a file to tape, try;
cat <tarball> > <tapedevice>
... which you can now do to create the other 2 tapes.
>
> I got thefile.tar off of the original tape using
>
> tar -xv ./thefile.tar -C /usr/thedirectorystore
>
> The tar file is now on the hard drive. Now I want to put it back onto
> tape, gee, simple minded me thought
>
> tar -cv ./thefile.tar -C /usr/thedirectorystore
>
> and bingo, but that doesn't seems to be happening. Any ideas on how I can
> complete this task?
>
> Thanks again,
>
> Anthony
>
> >Close, but no cigar.
> >
> >syntax is:
> >
> >tar -cvf /dev/tapedevice /usr/thedirectory.
> >
> >To make a full backup I did:
> >
> >tar -cvf /dev/st0 / --exclude /dev --exclude /proc
> >
> >(my tape drive is a scsi rdat on /dev/st0) This command backed up
> >everything, except the dev and proc directories. (I had some BAD
> >things happen trying to access the devices as files, and you don't
> >need to backup the /proc directory as it does NOT exist on the disk.)
> >Don't leave your cd rom mounted for this or it will get backed up
> >also, why waste 650MB of tape for something that can't be trashed?!
> >
> >
> >-----------------------------------------------------
> >Greetings,
> > Got what I thought was a simple problem. I have a 2GB DAT tape
> >drive, a
> >directory that I want to backup to that tape drive. Seems simple
> >enough,
> >but I can't seem to get it to work. I thought the command was:
> >tar -cvf thetarfile.tar /usr/thedirectory
> >
> >But it isn't working. Now I have created a tar file on the hard drive,
> >and
> >thought it would be just as easy to move the file to tape, but I can't
> >figure that out either. Tried mounting the tape drive and the machine
> >mocks me openly. Any and all help would be apprciated!
> >
> >
> >
> >
> >
> >
> >_________________________________________________________
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> >
> >
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>
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--
quiet rob
-----------
"Just keep telling yourself you are immortal" --Albert Hofmann
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