（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.

答案：（B）

解析：

FILESYSTEMIO_OPTIONS = {none | setall | direcitIO | asynch}

指定文件系统文件I/O操作