use strict;
use warnings;
use Data::Dumper;

my $inst;
my %host;

while(<DATA>) {
    if (/.*\/DISK\.(.*)\/.*/) {
        $inst = $1;
        next;
    }
    
    my ($dayofweek, $month, $date, $timing, $year, $dpoint) = split;
    push @{$host{$inst}}, {
        'dayofweek' => $dayofweek, 'month' => $month,
        'date' => $date, 'year' => $year,
        'timing' => $timing, 'dpoint' => $dpoint
        };
}

print Dumper(\%host);

__DATA__
wspmon03/DISK.ssd123/DSKAvgServ
     Wed Nov 30 00:01:27 2006 7.34562
     Wed Nov 30 00:02:29 2006 3.31222
     Wed Nov 30 00:03:33 2006 1.23511
     Wed Nov 30 00:04:23 2006 4.97532
     Wed Nov 30 00:05:37 2006 5.31112
     Wed Nov 30 00:06:36 2006 6.22991
wspmon03/DISK.ssd126/DSKAvgServ
     Wed Nov 30 00:01:27 2006 7.34562
     Wed Nov 30 00:02:29 2006 3.31222
     Wed Nov 30 00:03:33 2006 1.23511
     Wed Nov 30 00:04:23 2006 4.97532
     Wed Nov 30 00:05:37 2006 5.31112
     Wed Nov 30 00:06:36 2006 6.22991
wspmon03/DISK.ssd129/DSKAvgServ
     Wed Nov 30 00:01:27 2006 7.34562
     Wed Nov 30 00:02:29 2006 3.31222
     Wed Nov 30 00:03:33 2006 1.23511
     Wed Nov 30 00:04:23 2006 4.97532
     Wed Nov 30 00:05:37 2006 5.31112
     Wed Nov 30 00:06:36 2006 6.22991