Zalman Accessory ZM-HS100 3Bay hot-swap Drive expansion PCB for GS1000 Retail Zalman Accessory ZM-HS100 3Bay hot-swap Drive expansion PCB for GS1000 Retail. The ZM-HS100 is a proprietary GS1000 accessory that allows quick access, installation and removal of HDDs. By incorporating HotSwap, cable free HDDs can be connected immediately upon installation of the ZM-HS100. Zalman affixes a Computer Noise Prevention System (CNPS) mark to all components used for noiseless computers. Warranty - 1 year.