NBU 7.x ACS drives for restore only

Hello all,

a simple question : is it possible with NBU 7.x on Linux to set an ACS LTO drive in a "read only" mode ?

I mean this drive would be used only for restore, and there will no attempt to mount a tape on it for backup

I'm aware that there are many ways to get to this read only mode, as changing storage unit configuration (maximum concurrent write drives or other), but I'm wondering if there is a "make available for restore only" option

I've read admin guides ans search the forums, but I couldn't find exact info

Thank you