Heterogeneous SAN Tape Solutions?

chasmosis asks: "My company's decision to go with a heterogeneous SAN setup has our DataCenter Engineers banging their head's against a wall. Interoperability nightmares include matching microcode for various components to achieve some level of stability. One of the biggest current problems is with SAN connected StorageTek tape libraries, anytime a server scans the SAN for devices (ie on NT system boot, an AIX machine running cfgmgr , etc...) it accesses the tape drives, interrupting any currently running backups. What have others done to make their SANs more dependable, especially for backups/tapes?"