R740 support "12 Gbps SAS Controller" for connecting tape drive. You can refer below link for supported controller for various tape drives [URL]  Below are the part# for 12Gbps SAS controller for R740 2PHG9 - PWA,CTL,12GB-SAS-HBA,ADPT,FHT93GD - PWA,CTL,12GB-SAS-HBA,ADPT,LPF
Hi Every one, i need to know about the compatibility between PowerVault LTO8 External Tape - and R740 Connectivity. Which SAS card do i need to order for connectivity. 
PowerVault LTO8 External Tape - and R740 Connectivity