multiple label libvols?

[Snyder.John]

I've found that if I issue multiple "label libvol" commands (from the
webadmin gui), only ONE of the commands will run to completion
before the second will start.  I have 5 3590 drives and wanted to
use all of them at once to label several hundred new
tapes... but I can't figure out how to start multiple streams
simultaneously.  (Mountlimit is set to "drives" on the device class.)

Is it possible to multi-thread this kind of operation?

(TSM 3.7.3 on AIX 4.3.3)

Thanks...JRS