单项选择题
A. Run defragfs -r /data1； defragfs /data1
B. Run defragfs -r /dev/lv01； defragfs /dev/lv01
C. Back up the filesystem by name， unmount the filesystem， recreate the filesystem by running mkfs /dev/lv01， and restoring the data from the backup.
D. Back up the filesystem by inode， unmount the filesystem， recreate the filesystem by running mkfs /dev/lv01， and restoring the data from the backup.
单项选择题 ThesystemadministratornoticesthatthereisanI/Obottleneckononeofthreedisksindatavgvolumegroup.ThisproblemdiskcontainstheJFSlog，loglv00andonefilesystem，/mydatabase.Therearenootherlogicalvolumesonthisdisk.Whichofthefollowingoptionswouldbethebestsolution？（）
单项选择题 To examine the Exhibit， press the Exhibit button. Using the "ps -mo THREAD" output as shown in the exhibit， which of the following conclusions is most appropriate to draw？（）
单项选择题 WhichofthefollowingmetricsprovidedbytheiostatreportisusedtoinitiallydetermineifadiskisI/Obound？（）