DP 8.1 yellow drive

Hello,

so we buidl up our DP 8.11 test environment and configured the first devices. Inter alia an MSL Tape Library.

Since we configured the drives for the msl, the first drive ist marked yellow (See attachment). But we dont know what it means and i cant find anything on documents/ or the internet.

Can you tell me what it means?

Thanks a lot!