How to restore or attach database

Question

Hi all,
I had installed oracle 9.i on PC01 computer, then I created database is KT01 at C:\oracle\oracledata\KT01 path.
Unfortunately, PC01 has died, but I didn't backup KT01 database. so I must install oracle 9.i on PC02 computer, and copy KT01 folder that contain data in PC01 to PC02.
- if I create database with the same name and path is C:\oracle\oracledata\KT01 on PC02, and copy KT01 database from PC01 to overwrite on PC02. then mount and start KT01 database, it is ok.
- if I create database with the same name, but difference path (example: D:\oracle\oracledata\KT01) on PC02, and copy KT01 database from PC01 to overwrite on PC02. then mount and start KT01 database. it is not run, how can I sovle this problem
- in case, oracle in PC01 is version 8.x, but oracle version in PC02 is 9.i, How can I do it.
please help me, thanks.
Nguyen

Answer 1

Hi.
If you have all datafile from original database you can simply move all files from pc01 to kt01 in a folder you decide.
Than you have to recreate the controlfiles. You need to change the initialization parameter file so that the controlfile parameter points to the new location. Also when moving the files over you need only the datafiles. Controlfile is recreated aswell as the redolog files when doing a open resetlogs. If you want to change the database name, you substitute the
CREATE CONTROLFILE REUSEwith
CREATE CONTROLFILE SETBelow is an example of recreation of controlfiles using the resetlogs option:
(Substitute the datafile and redo log locations)
# Set #2. RESETLOGS case
# The following commands will create a new control file and use it
# to open the database.
# The contents of online logs will be lost and all backups will
# be invalidated. Use this only if online logs are damaged.
STARTUP NOMOUNT
CREATE CONTROLFILE REUSE DATABASE "DBTEAM" RESETLOGS NOARCHIVELOG
-- SET STANDBY TO MAXIMIZE PERFORMANCE
MAXLOGFILES 5
MAXLOGMEMBERS 5
MAXDATAFILES 100
MAXINSTANCES 1
MAXLOGHISTORY 3176
LOGFILE
GROUP 1 (
'D:\ORACLE\ORADATA\DBTEAM\DBTEAM_REDO_1A.LOG',
'D:\ORACLE\ORADATA\DBTEAM\DBTEAM_REDO_1B.LOG'
) SIZE 10M,
GROUP 2 (
'D:\ORACLE\ORADATA\DBTEAM\DBTEAM_REDO_2A.LOG',
'D:\ORACLE\ORADATA\DBTEAM\DBTEAM_REDO_2B.LOG'
) SIZE 10M,
GROUP 3 (
'D:\ORACLE\ORADATA\DBTEAM\DBTEAM_REDO_3A.LOG',
'D:\ORACLE\ORADATA\DBTEAM\DBTEAM_REDO_3B.LOG'
) SIZE 10M
-- STANDBY LOGFILE
DATAFILE
'D:\ORACLE\ORADATA\DBTEAM\DBTEAM_SYSTEM_1.DBF',
'D:\ORACLE\ORADATA\DBTEAM\DBTEAM_UNDO_1.DBF',
'D:\ORACLE\ORADATA\DBTEAM\DBTEAM_TOOLS_1.DBF',
'D:\ORACLE\ORADATA\DBTEAM\DBTEAM_DESIGNER_DATA_1.DBF',
'D:\ORACLE\ORADATA\DBTEAM\DBTEAM_DESIGNER_INDEX_1.DBF',
'D:\ORACLE\ORADATA\DBTEAM\DBTEAM_SYSDOC_DATA_1.DBF',
'D:\ORACLE\ORADATA\DBTEAM\DBTEAM_SYSDOC_INDEX_1.DBF'
CHARACTER SET WE8ISO8859P1
# Recovery is required if any of the datafiles are restored backups,
# or if the last shutdown was not normal or immediate.
RECOVER DATABASE USING BACKUP CONTROLFILE
# Database can now be opened zeroing the online logs.
ALTER DATABASE OPEN RESETLOGS;
# Commands to add tempfiles to temporary tablespaces.
# Online tempfiles have complete space information.
# Other tempfiles may require adjustment.
ALTER TABLESPACE TEMP ADD TEMPFILE 'D:\ORACLE\ORADATA\DBTEAM\DBTEAM_TEMP_1.DBF'
SIZE 52428800 REUSE AUTOEXTEND ON NEXT 10485760 MAXSIZE 1048576000 ;
# End of tempfile additions.
It is not possible to clone a database between versions. If you want to upgrade to 9i, you should probably startup the database on 8i, do an export as system user and import it into a newly created 9i database. Or use the direct upgrade path from metalink.
Good luck
Rgds Kjell