Seeing as though you have an iSeries...
Get Tivoli Storage Manager... Just plain works... Pain in the A$$ to install a central server... but once done, upgrades or changes are a dream. Is better to install with 5.x now... but when it was ADSM icky.
It is a dream to use, command line or GUI. Plus you can make it so each machine does it's own thing if you want OR you can have a central scheduler and managed tapes drives and changers, etc...
I use it everyday, I cannot imagine my job(err maybe life eh?) without it. It...it... well nothing in my book beats it, NOTHING.
Legato, NETback, TAR, Arkeia, Amanada (is good but hard to get working correctly period), Vertias, CA, BRU (still in Business?), SBACK, BKUP and such... NONE work as slick or better than TSM. NONE.
That's all folks... move along nothing to see here... just move right into IBM's arms please...
Yeah... Yeah... talk to the hand... Face don't wanna know.