User Managed Back-up : ORA-00600: internal error code

Question

Hallo!I was trying to assess whether I can implement a user managed Oracle 10g database backup of an orcl instance (for testing purposes).I know how to use RMAN but I am just curious about a user-managed back-up and recovery solution
My idea was to copy the db files (controlfiles,datafiles,redo log files)in the oradata/orcl directory to a different disk partition,delete the orcl folder,return the copied orcl folder to the oradata folder and startup the instance.
After doing this,I tried to startup the instance but it could only reach the mount stage.When I typed the alter database open command,the error below resulted
ORA-00600: internal error code, arguments: [kcratr1_lastbwr], [], [], [], [],[], [], []
I am aware I can use the recover database command in RMAN but for curiosity purposes,I would like to know if an alternative option exists to recover the db assuming a user managed backup without RMAN.
Thanks.

Answer 1

My idea was to copy the db files (controlfiles,datafiles,redo log files)Was the database
a. SHUTDOWN IMMEDIATE/NORMAL before you did the copy
OR
b. in Backup mode with ALTER DATABASE BEGIN BACKUP
You need either of a. or b. (Oracle cannot stop you from copying files when the database is open but needs to know that they are copied in a fuzzy state and that is one of the several things that the ALTER DATABASE BEGIN BACKUP does).
If you used method b. you also need an ALTER DATABASE END BACKUP, ALTER SYSTEM SWITCH LOGFILE and a backup of the ArchiveLogs generated between the BEGIN BACKUP and END BACKUP.
Hemant K Chitale