Joseph just wrote..
>4. I have only used DEVCTRL with DDS (2 & 3) so DLT may be different. (I
>don't see why but who knows.)
No problems with DLT 4000s and DEVCTRL.
Also, a pause after using DEVCTRL is always a good idea. And some
combinations of hardware and software compression can actually slow down a
back up, but 30+ hours would be way beyond that.