Which command synchronizes or rebuilds the logical volume control block， the device configuration database， and the volume group descriptor areas on the physical volumes？（）

单项选择题An administrator is installing AIX 6.1 on a new LPAR and the boot sequence has stalled with reference code 0c31. What is the most likely cause？（）

A.The system is waiting for user input to define console type lft0.
B.The system is waiting for user input to define console type tty0.
C.The system is waiting for user input to define console type vty0.
D.The system is waiting for user input to define console type vsa0.

单项选择题An administrator suspects problems on a SCSI hard disk，but upon running diagnostics，no errors were found. What must be done to check the condition of the drive？（）

A.Run diag and select the ‘Certify Media’ task.
B.Perform a read and write test on the disk and monitor errorlog.
C.Update the disk firmware to the latest level and monitor errorlog.
D.Format the disk to ensure bad blocks are omitted from the disk layout.

单项选择题LPAR1 is configured to have the same 2 LUNs virtualized by a redundant pair of VIO servers.  Which command will validate that both storage paths are available？（）

A.Lspath
B.sdd query adapter
C.pcmpath query adapter
D.datapath query device

单项选择题Files  tmp file2 and  tmp file3 are hard linked to  tmp file1. What will the result be if a user makes changes to  tmp file2 at the same time another user tries to delete  tmp file1？（）

A.All three files will contain the updates and will remain available.
B.All three files will be deleted and no changes will be made to /tmp/file2.
C.Only /tmp/file2 will contain the updates， but /tmp/file3 will remain available.
D.Both /tmp/file2 and /tmp/file3 will contain the updates and will remain available.

单项选择题Howcananadministratorverifythatthediskisstillusablewhentheoutputof‘lspv’shows‘hdisk1’isinamissingstate？（）

A.lspv -l hdisk1
B.lscfg -l hdisk1
C.lsattr -l hdisk1
D.dd if=/dev/hdisk1 bs=512k count=10 of=/tmp/disk.txt