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Database won't open -- SYSTEM datafile offline, and needing media recovery in NOARCHIVELOG mode

edited Dec 19, 2012 4:45PM in Database Administration (MOSC) 3 commentsAnswered
Database:  11.2.0.1

Platform:  Windows Server 2008R2, 64-bit

Detail:

I have a database I successfully recovered using the process below.  However, now it reports (a) that it needs media recovery (on a REDO datafile); and (b) that the datafile supporting the SYSTEM tablespaces is offline.

Restore, recover, and open resetlogs worked great many times, but not this last time.  Had great success with "recover database using backup controlfile until cancel;" for a bit as well.

Now, attempts to bring the datafile online result in "database must be open read/write" errors.

Any thoughts on how to get this bad boy to open?  Problem occurred during recovery while troubleshooting a SYSMAN/emca issue (documented separately).

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