The database I look after (64bit 8i, HP-UX 11 64bit N Class 4 x CPU, 6GB RAM) is currently 615GB so we're not quite at the terrabyte yet. During our DR testing one obvious issue that arose was the time it took to restore the database. I was confidently told by one of the HP DR engineers that with a SAN backbone upgrade and a new tape library we could do full backups in around 3 hours. We got a new tape library (ADIC Scalar i2K) and have got the full backups down to 12 hours using NetBackup/RMAN with two channels (more channels slowed it down as the network upgrade to 2 gigabit has not happened yet, and we can't get the throughput for more than 2 channels). Once the network upgrade has happened we'll move to 4 channels so I hope the full backup will go down to the extent that I can do nightly full backups. For the moment we do nightly incrementals and a weekly full. Archive logs are backed up every 3 hours.

Hope this helps

Austin