Replacing hard disk with used disk in a server

Hello,

One of my clients has 2  IBM xSystem360 servers, both of them are the same model. One of the servers had a disk failed, and becuase the replacement disk is due to arrive in the end of the week, he would like to replace the failed disk with one disk of the other, operational server. Could any problem arise in this case?? Do we need to wipe the disk before replacing it or the RAID controller will just rebuild it like it was new?? 

Thanks a lot!