Used as field upgrade from DLT to SDLT or as Add-on drive to ESL9326SL libraries ESL9326DX field upg SDLT 110/220 HVD drive in hot plug canister for existing ESL9326D/DX HVD librariesThe ESL9326D/DX is capable of drive upgrade to SDLT110/220 HVD drive. **** Requires upgrade of firmware (to V2.3) and extension axis kit (249632-B21). **** The extension axis kit must be ordered for all ESL9326D/DX libraries being upgraded to SDLT drive.