3.5. Recovering Read-Only Tablespaces
A read-only tablespace is a tablespace that contains static information. This means that in most cases, no media recovery is required. This type of read-only tablespace recovery is of a non-critical nature.
There are only a few times when media recovery is required with a read-only tablespace. The first is when the last backup of the read-only tablespace was taken when the tablespace was read-write and the tablespace was made read-only afterward. The second is when the tablespace was read-only when the last backup was taken, then was made read-write in between, and then was made read-only again. These two scenarios are really saying that the checkpoint process that updates the SCNs for the control file and ...
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