> > > backup about 10-15G per day.
> >
> > IMHO it's hardware overshoot. for this i would but one DDS-3 or DDS-4
> > drive.
>
> Exept I want a reliable backup drive. I'm not interested in writing tapes
> I can't read 6 months laters.

you mean DAT is unreliable?
never observed this (except when reading DDS-1 tape on wangDAT which was
written on DDS-2 HP drive, there were few correctable errors)

but it's important for DAT drives to use cleaning tape every 20-30 hours
of work.

> And, on occasion we have to write 30G to a tape.
what a problem to change tape after 2-3 hours?