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？（）

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

单项选择题Aserverwillnotbootandtheadministratorneedstorunfsckonthefilesystemstoverifytheirintegrity.InstallationmediaanddiagnosticmediaisunavailableandthereisnoNIMmasterdefinedinthisenvironment.Howwouldtheadministratorbringthesystemuptobeabletorunfsckonallthefilesystems？（）

A.Boot from the IBM Disaster Recovery boot server thru the network.
B.Installation media or diagnostics media is required to acquire the rootvg.
C.Boot to maintenance mode， enter a limited function shell， and execute getrootfs hdisk0.
D.Hold space bar at boot time to automatically initiate a limited function shell， then enter getrootfs hdisk0.