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

单项选择题Asystemadministratorisattemptingtorestoresomefilesfromabackuptape.Therestorefailed.Thesystemadministratorsuspectstheblocksizeofthetapedriveisincorrect.Whichofthefollowingcommandscanbeusedtodeterminetheblocksizeofthebackuptape？（）

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

单项选择题Asystemadministratorwantstoautomaticallyejectthebackuptapeeachnightafterthebackupiscomplete.Whichcommandcanbeusedtoejectthetape？（）

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

单项选择题Therootvgdiskonasystemfailedandwasreplaced.Thesystemwasrestoredusingthelatestmksysb.However，nofilesinthe homefilesystemwererestored.Whatisthelikelycauseofthisproblem？（）

A.The new drive is too small to hold the entire rootvg
B.The /home filesystem was not mounted during creation of the mksysb
C.The /home stanza in the bosinst.data contained an entry ’restore=no’
D.The /home filesystem was NFS exported to another system during creation of the mksysb

单项选择题Asystemwithoutamonitorhascrashed.Theadministratorwouldliketoseetheconsoleoutputtodetermineapossiblecauseofthecrashandensurethattherewerenoproblemsonreboot.Whichcommandwouldbeused？（）

A.alog
B.swcons
C.lscons
D.syslog

单项选择题AfteraddinganewEthernetcardtoasystemandrebooting，thesystemadministratornoticesthecardwasnotconfigured.Howcanthesystemadministratordetermineiftherewereerrorsduringtheconfigurationprocessforthecard？（）

A.Examine the bootlog with the command： alog -o -f /var/adm/ras/bootlog
B.Display the device attributes and errors with the command： lsdev -C -l ent0
C.Examine the AIX errlog for configuration method errors with the command： errpt -a -C ent0
D.Examine the ODM for configuration errors with the command： odmget -q "method_errors" ent0