Which two are prerequisites for running the I/O calibration tool? (Choose two.)
A. The database must be in MOUNT state.
B. The database should be opened in restricted mode.
C. For determining latency time, the STATISTICS_LEVEL parameter must be set to TYPICAL or ALL.
D. The disks to be tested must be configured to use asynchronous I/O for data files. E. The database instance must be started using an SPFILE.
Which two are prerequisites for running the I/O calibration tool? (Choose two.)
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