Mike, I will be interested if you can provide us with this info please ...- effective bytes per second from v$backup_async_io for sbt_tape and type of D or L.
- Your RMAN configuration and script.- Output of code below to show your transfer rates from RMAN. Show us the mb_sec column please.
select bs.completion_time,bs.set_stamp,bs.set_count,bs.backup_type,bs.incremental_level,bs.elapsed_seconds,round((sum(bd.blocks*bd.block_size)/1048576)/bs.elapsed_seconds,2) mb_sec,count(bd.file#),bd.pieces ,round(sum((bd.datafile_blocks*bd.block_size))/1048576,2) db_size_mb,round(sum((bd.blocks*bd.block_size))/1048576,2) Rman_size_mb
from rc_backup_set bs, rc_backup_datafile bd where bs.set_stamp = bd.set_stamp and bs.set_count = bd.set_count ---------------------------------------- and bs.db_id=4269907151 ----------------------------------------group by bs.completion_time,bs.set_stamp,bs.set_count,bd.pieces,bs.elapsed_seconds,bs.backup_type,bs.incremental_level
ORDER By bs.completion_time ; -- //www.freelists.org/webpage/oracle-l