ASM

How to Resolve SPFILE in DB_UNKNOWN

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SPFILE in DB_UNKNOWN When I tried to restore SPFILE to the default location at nomount state, I found that SPFILE was restored to a DB_UNKNOWN in ASM. Is it a bug dedicated to Oracle 10g RAC (Bug 5370663)? No, I saw it too in 12c R1 RAC restoration. Let’s reproduce the problem. First, check what […]
RMAN

How RMAN Restore Database by a Backup Set

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Suppose we have restored the whole OS to the new server including Oracle software and directory structure. Our goal is to restore the database to the target server solely by a backup set for testing purpose. The content of the backup set that we copied from the source server to the target server is listed […]