I have 2 3590 tape drives on a 3494 Tape library connected to my AIX platform via an ESCON channel adapter. The ESCON link attaches to a s390-A50 on the 3494 side. I am not sharing the library--I have the 2 drives varied offline to the 3494. I have the tapes configured to the AIX platform and can use them, ie., I tested with 'tar' and/or 'dd' commands. I defined the drive on AIX side as /dev/rmt8 and the 'lsdev' command sees them as a 3590 tape drives. I cannot get TSM 4.1.2 to see them. When I define the DEVCLASS DEVTYPE=3590, no problem. I define LIBRARY as LIBTYPE=MANUAL, no problem. I define DRIVE as DEVICE=/dev/rmt8, no problem. But when I QUERY DRIVE the drive shows up as CARTRIDGE and when I try to EXPORT a NODE, I get a message, via Q PROC, that TSM is "waiting for mount point in device class 3590EXP" and nothing happens. Any ideas?