SL500 with LTO5 and LT04 drives in Netbackup

Hi,

We  have SL500 library (4xLT04) connected with Netbackup 7.5 media server. We are going add a expansion module with two LTO5 and 50 cells to same library. And we need to use both LTo4 and LTo5 tapes in the same library. My question is how netbackup will manage tapes of different densities? Will it try load LTO5 tapes to LT04 drives? If yes is there any way to ensure only LTO4 media loaded in LT04 and LT05 media to LTO5 drive? Do we need to some kind of partitioning in SL500 library to ensure  correct media loaded in to corresponding drive type?

Regards,

Anish