Another tip for you...With Perl, you can specify indicies from either side of an array or list. Some of your data lines have 8 some 9 things. So to get the 6th thing and the last thing, do it like this.. Main point is that by using negative index, you can get the last thing even if number of things varies. I think your actual data is tab separated? if so, then adjust accordingly.

while (<DATA>)
{
    my ($desc,$MB) = (split)[5,-1];
    print "$desc $MB\n";
}
=prints
2-Way 3
2-Way 3
2-Way 3
RAID-5 8632
RAID-5 8632
RAID-5 34526
2-Way 34526
2-Way 34526
2-Way 69052
RAID-5 34526
RAID-5 34526
RAID-5 69052
RAID-5 69052
BCV+R5 34526
BCV+R5 34526
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The index of -1 means "last item", -2 would mean next to last one, etc.