A pSeries server is being used as a file server and all data is stored on a non-root volume group and resides on mounted filesystems. Which of the following commands provides the quickest way to backup all of the data and filesystem definitions？（）

Acompanyusesrawlogicalvolumes.Whichcommandcanbeusedtoba...

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

Asystemadministratorisattemptingtorestoresomefilesfroma...

单项选择题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？（）

Asystemadministratorwantstoautomaticallyejectthebackupt...

单项选择题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？（）