List, I have been looking into using Data Guard as a method of providing HA is = the company decides it is an option they want to invest in. The question that I have are. 1. Using a physical database as the Data Guard, does the second server = have to have the exact same physical equipment for the disks or does it = just have to be the same directory structure? The reason I am asking is = the production server has a SAN that I use as /U03 mount point where the = archivelogs and a controlfile are kept. I can not get another SAN for the = standby server but would like to use a SCSI box with the same mount point = but different disk size. 2. Currently I use RMAN nocatalog mode for the backups of the production = database to disk. It appears from what I have read the when I use RMAN and = Data Guard I have to use a catalog. IS this a true fact? Can you point to = a doc that clears this question up? Thanks, Ron Rogers DBA Linux SYSadmin Georgia Lottery Corp. -- //www.freelists.org/webpage/oracle-l