use warnings;
use strict;
use Spreadsheet::WriteExcel;

my $workbook = Spreadsheet::WriteExcel->new("data.xls");
my $worksheet = $workbook->add_worksheet();

$worksheet->write ("A1", 'Device');
$worksheet->write ("B1", '/var');
$worksheet->write ("C1", '/');
$worksheet->write ("D1", 'interleaved');
$worksheet->write ("E1", 'avm');
$worksheet->write ("F1", 'fre');
$worksheet->write ("G1", 'cs');
$worksheet->write ("H1", 'us');
$worksheet->write ("I1", 'sy');
$worksheet->write ("J1", 'id');
#$worksheet->write ("K1", 'Date');



my $row = 2;
my $line = '';
my $device;

open inFile, '<', 'logs.txt' or die "Couldn't open data.txt: $!";

while (! eof inFile)
  {
  $line .= ' ' . <inFile>;
  chomp $line;
  next if ! ($line =~ /logging\sto\s(.*?)\s+/i) and ! eof inFile;

  my $nextDevice = $1;
  if    
    
($line =~ /(\d+)%\s+\/var\s+(\d+).*?(\d+)%\s+Interleaved\s+.*?avm\s+.*
+?fre\s+.*?cs\s+.*?us\s+.*?sy\s+.*?id\s+.*?(\d+)\s+(\d+)\s+(\d+)\s+(\d
++)\s+(\d+)\s+(\w+)/i)
    
    {
    $worksheet->write("A$row", "$device");
    $worksheet->write("B$row", "$1");
        $worksheet->write("C$row", "$2");
        $worksheet->write("D$row", "$3");
        $worksheet->write("E$row", "$4");
        $worksheet->write("F$row", "$5");
        $worksheet->write("G$row", "$6");
    $worksheet->write("H$row", "$7");
    $worksheet->write("I$row", "$8");
    $worksheet->write("j$row", "$9");
    #$worksheet->write("j$row", "$10");

    ++$row;
    print "$device $1, $2, $3, $4, $5, $6, $7, $8, $9\n";
    }

  $device = $nextDevice;
  $line = '';
  }

close inFile;

$workbook->close ();
[download]

($line =~ /(\d+)%\s+\/var\s+(\d+).*?(\d+)%\s+Interleaved\s+.*?avm\s+.*
+?fre\s+.*?cs\s+.*?us\s+.*?sy\s+.*?id\s+.*?(\d+)\s+(\d+)\s+(\d+)\s+(\d
++)\s+(\d+)\s+(\w+)/i)
[download]

Your cdoe works fine, except that last (\w+) is $9, which is "72" (the 'id' value) .. you're not capturing the date string at all.. if you just change it to:

$line =~ /(\d+)%\s+\/var\s+(\d+).*?(\d+)%\s+Interleaved\s+.*?avm\s+.*?
+fre\s+.*?cs\s+.*?us\s+.*?sy\s+.*?id\s+.*?(\d+)\s+(\d+)\s+(\d+)\s+(\d+
+)\s+(\d+)\s+(\d+)\s+.*?(\d\d):(\d\d):(\d\d)/i

print "$device $1, $2, $3, $4, $5, $6, $7, $8, $9, $10, $11, $12\n";
[download]

you get the hour/min/sec at the end ...

You might, however, consider a different approach to making the parsing easier:

use strict;
use warnings;

my @devices;
while( my $line = <DATA> ){
  next unless $line =~ /^\s*logging to (\w+) is ([0-9.]+) . . ./;
  my %device = (
        name => $1,
        ip => $2,
        partitions => [],
  );
  do { $line = <DATA>; } until $line =~ /\S/;
  while( $line =~ /^(\d+)%\s+(\S+)/ ){
    push @{$device{partitions}}, { name => $2, pct_used => $1 };
    $line = <DATA>;
  }
  warn "Expected 'disks faults' line" unless $line =~ /disks faults/;

  $line = <DATA>;
  chomp($line);
  warn "Expected 'avm fre cs us sy id' line" unless $line =~ /avm fre 
+cs us sy id/;
  my @cols = split ' ', $line;
  warn "wrong number of columns" unless scalar(@cols)==6;

  $line = <DATA>;
  chomp($line);
  warn "Expected numbers on '$line'" unless $line =~ /(\d+ ){5}\d+/ &&
+ $line !~ /[^0-9 ]/;
  my @vals = split ' ', $line;
  warn "wrong number of values" unless scalar(@vals)==6;

  @{$device{attributes}}{ @cols } = @vals;

  $line = <DATA>;
  chomp $line;
  warn "Expected device name on '$line'" unless $line eq $device{name}
+;

  $line = <DATA>;
  chomp $line;
  if( $line =~ /(\d\d):(\d\d):(\d\d)/ ){
    @{$device{date}}{ qw/hour minute second/ } = ( $1, $2, $3 );
  }else{
    warn "Couldn't parse date line: '$line'";
  }

  push @devices, \%device;
}
use Data::Dumper;
print Dumper \@devices;

exit;

__DATA__

logging to device1 is 2.3.5.1 . . .

56% /var
38% /
31% Interleaved
disks faults
avm fre cs us sy id
504956 19880 32 3 24 72
device1
Tue Sep  9 11:26:44 ist 2005

 logging to device2 is 2.3.5.1 . . .

96% /var
88% /
100% Interleaved
disks faults
avm fre cs us sy id
5049 198 32 3 24 72
device2
Tue Sep  5 10:26:44 GMT 2005
[download]

(there's many ways to do this -- e.g. another way might be to do something clever with $/)

hi ! let me check that and confirm with you ! Thank a ton !