Hi Stefano It looks like your I/O performance is very low(~75GB/hr with SQL backtrack), I'd suggest looking into that first - perhaps by seeing if a disk-to-disk copy can do any faster to help identify where the problem is. For comparison, our HPUX Itanium servers with EMC SAN and RAID-5 can copy disk-to-disk at about 300GB/hr. At a previous site, a full level-0 RMAN backup could do either 3 or 5 TB (don't have my notes on hand!) in 10 hrs - this was Sunfire server with a dedicated Gb-ethernet LAN for backups going to TDP with disk pool staging and around 6 tape heads. The TDP server had heavy contention for resources from other databases though. But I'd suggest finding if/where the I/O bottleneck is before bringing RMAN into the picture. There is also a very good Oracle whitepaper on tuning RMAN which helped me to halve level-0 backup times. Hope that helps... Jeff Wong On 3 July 2010 07:34, Stefano Cislaghi <s.cislaghi@xxxxxxxxx> wrote: > Hello all, > > looking here for some tips on debug RMAN backup using TDP. > Simply my RMAN backup is working, but is slow. > > My enviroment is using a TSM server that uses disks and not tape...this > should be quite fast. > > Actually we're using a third party tool (BMC SQL Backtrack) to backup and > this is doing for comparison 100Gb of DB in about 1h30m. > > My RMAN full backup using TDP for same 100Gb takes 3h. > > There's no RATE defined and restrictions on RMAN channel instantiation and > in dsm.opt for TDP. > > Simply looking during backup my disks reading does not reach a speed up to > 20MB/s. > > > Any suggestions? > Thanks > Ste >