Question on Online-Backup

The Online Backup crashes. Startup open fails with the following errors

  ORA-01113: file 1 needs media recovery   ORA-01110: data file 1: 'E:\ORANT\DATABASE\DBFILE\SYS1ORCL.ORA'

There are two possibilities to recover database.

1. recover database
2. alter database datafile "filename" end backup;

now, my questions are:

    if all of data files, control file, redo log files etc. are ok, can i always

    apply the methode 2 ?

    must the archive disk be mirrored ?

    which action must the system additionally do during online-backup ?

Thanks in advance for any help. Received on Mon Oct 11 1999 - 08:54:46 CDT