Besides sourcing the slider$-$head subassembly from the suppliers you have the option of producing the

sub$-$assembly in$-$house. In fact you can bring$-$up a slider$-$head subassembly unit right next to your HDD

assembly plant. To build a capacity that can cater to your $10$ year demand of HDDs in the U$.$S$.$ market

would cost you about $$5$ million