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Full Discussion: lost data
Top Forums UNIX for Advanced & Expert Users lost data Post 25028 by RTM on Tuesday 23rd of July 2002 04:55:27 PM
Old 07-23-2002
The data was not overwritten but the table at the begining of the original tar file was - so tar isn't going to see anything.

Check the man page for dd and possibly cpio. One or the other MAY help to dump what was on the tape (although what is dumped may be useless). What OS are you using?
 

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virt-tar-in(1)						      Virtualization Support						    virt-tar-in(1)

NAME
virt-tar-in - Unpack a tarball into a virtual machine disk image. SYNOPSIS
virt-tar-in -a disk.img data.tar /destination virt-tar-in -d domain data.tar /destination zcat data.tar.gz | virt-tar-in -d domain - /destination WARNING
Using "virt-tar-in" on live virtual machines can be dangerous, potentially causing disk corruption. The virtual machine must be shut down before you use this command. DESCRIPTION
"virt-tar-in" unpacks an uncompressed tarball into a virtual machine disk image or named libvirt domain. The first parameter is the tar file. Use "-" to read the tar file from standard input. The second parameter is the absolute target directory to unpack into. EXAMPLES
Upload a home directory to a guest: virt-tar-in -d MyGuest homes.tar /home JUST A SHELL SCRIPT WRAPPER AROUND GUESTFISH
This command is just a simple shell script wrapper around the guestfish(1) "tar-in" command. For anything more complex than a trivial copy, you are probably better off using guestfish directly. OPTIONS
Since the shell script just passes options straight to guestfish, read guestfish(1) to see the full list of options. SEE ALSO
guestfish(1), virt-cat(1), virt-copy-in(1), virt-copy-out(1), virt-edit(1), virt-make-fs(1), virt-tar-out(1), <http://libguestfs.org/>. AUTHORS
Richard W.M. Jones ("rjones at redhat dot com") COPYRIGHT
Copyright (C) 2011 Red Hat Inc. <http://libguestfs.org/> This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. libguestfs-1.18.1 2013-12-07 virt-tar-in(1)
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