單項(xiàng)選擇題

A company uses raw logical volumes. Which command can be used to back up the data in the raw logical volumes to a tape？（）

A.dd
B.tar
C.cpio
D.mksysb

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單項(xiàng)選擇題

A system administrator is attempting to restore some files from a backup tape. The restore failed. The system administrator suspects the block size of the tape drive is incorrect. Which of the following commands can be used to determine the block size of the backup tape？（）

A.dd
B.tar
C.cpio
D.restore

單項(xiàng)選擇題

A system administrator wants to automatically eject the backup tape each night after the backup is complete. Which command can be used to eject the tape？（）

A.tar
B.tctl
C.rmdev
D.backup