I'd use a hash, keyed on raid type and device size. You only need one value then: the count: 
$count{$raid_type}{$device_size}++;

[download]
or 
$count{$raid_type,$device_size}++;

[download]

In reply to Re: Counting devices types, device sizes and number of devices. by JavaFan
in thread Counting devices types, device sizes and number of devices. by perl514

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