Structure-Retaining Database Copy 
Use
With BRBACKUP you can make a copy of the database files which has exactly the same directory structure. You can use this type of database to
- generate a test system from a production system
- Set up a
Standby Database Scenario.
have a database backup available which saves you the restoration process during a recovery. In this case the Oracle Home directory will be renamed as the new Oracle Home directory of the database copy (set link). The copied files are then the current files and the offline redo log files can be imported directly.
change the location of the database files (file system or raw device). Database copy is the only way of moving database files from one file system to raw devices (or vice versa) by means of BRBACKUP.
Prerequisites
The following directories must be created on the target database:
sapdata
directories
sapbackup
directory
origlogA
,
origlogB
,
mirrlogA
,
mirrlogB
directories of the online redo log files
The corresponding subdirectories are created automatically during copying.
/oracle/c11/sapdata2/stabd_1/stabd.data1
is copied to
/oracle/c12/sapdata2/stabd_1/stabd.data1
Since this type of copy is a 1:1 copy no software compression may take place.
To make the copy of the database you have to define the name of the new Database_Home directory (of the database copy) in the
init<SID>.sap
profile parameter
new_db_home. In addition to this set the parameter
backup_dev_type to
disk_copy
or call up BRBACKUP with the relevant command option
brbackup -d|-device disk_copy
.
Under Windows NT, the
sapdata
directories can be distributed across several drives. When you make the copy, you can retain this distribution by specifying the appropriate target drives (see brbackup
m|-mode).