gpart /dev/hda

gpart -W /dev/hda /dev/hda

dd if=/dev/hda5 of=/mnt/hardiskextern/hda5.img

#!/usr/bin/perl

use Math::BigInt;

$i=0;
$final=5272372224;
$j=$final-$i;
print $i,"\n";
print $final,"\n";
print $j,"\n";

while ($i < $final) {
`losetup -d /dev/loop1`;
`losetup -o $i /dev/loop1 /media/stick/splited/hda5bis.img`;
$returncode = `mount -t ext3 /dev/loop1 /mnt/tmp 2>&1`;
if ( !(index ( $returncode,'mount: wrong fs type, bad option, bad superblock on /dev/loop1,')+1) )
{
print $i,"\n";
exit;
}
$i=$i+512;
print $i,"\n";
}