Creating nightly full backups

Hi,

I work at a rather small iSeries ISV. 

We have a 270 with around 70GB DASD, around 25GB used. This machine runs
V5R3M0.

A few days ago, i had an interesting discussion with our developers
while thinking about a new backup concept (we just replaced our old
windows 2000 server with a windows 2003 one).

On our windows and linux machines, i run nightly full backups, which
allow for an easy and fast system restore. These backups are completely
automated, incur no downtime at all, our administative personal just has
to change the tapes.

On our iSeries however, we don't have anything like it. We do daily
backups of our data and program libraries, but this requires our ERP
software to shut down. Also, monthly (SAVLIB *NONSYS) and system backups
(SAVSYS) require an attended backup.

I would like to get this process up to date, running a nightly full
backup which contains a SAVLIB *NONSYS and a SAVSYS, which should allow
us to restore using a single tape. Our iSeries developers (which,
contrary to myself have a large amount of experience on the iSeries)
said that this couldn't be done.

We do have BRMS licensed, but we don't use it (yet). I also read about a
"Save while Active" feature, which should allow to save librarys while
they are in use.

Is there really no possibility to achieve something like that? Our
iseries system was far more expensive than our windows machine
(including all software licenses), but doesn't have the possibility to
do a decent, unattended full backup? I learned to like this platform,
but this looks like a rather big drawback

Hopefully you guys can tell me that we just didn't look at the right
place.

Thanks in Advance,

Lukas Beeler