48.View the Exhibit to examine the error obtained during the I/O calibration process. There are no data
files on raw devices. What is the reason for this error?
A. The DISK_ASYNCH_IO parameter is set to TRUE.
B. The FILESYSTEMIO_OPTIONS parameter is set to NONE.
C. Another session runs the I/O calibration process concurrently.
D. The pending area has not been created before running the I/O calibration process.
Answer: BFILESYSTEMIO_OPTIONS
initialization
parameter to enable or disable asynchronous I/O or direct I/O on file system files. This parameter is platform-specific and has a default value that is best for a particular platform.FILESYTEMIO_OPTIONS
can be set to one of the following values:
-
ASYNCH:
enable asynchronous I/O on file system files, which has no timing requirement for transmission. -
DIRECTIO:
enable direct I/O on file system files, which bypasses the buffer cache. -
SETALL:
enable both asynchronous and direct I/O on file system files. -
NONE:
disable both asynchronous and direct I/O on file system files.