The /systest filesystem is associated with the /dev/testlv logical volume on the testvg volume group. The testvg volume group is assigned to physical volumes hdisk2 and hdisk3. Which command can the system administrator use to determine if the /systest filesystem is mirrored？（）

单项选择题Asystemadministratorhasafaileddiskdrivethatismirroredtoanotherdiskdrive.Theysuccessfullyremovedthelogicalvolumecopiesoffofthefaileddiskdrive.Whichofthefollowingcommandsshouldbeusedtoremovethefaileddiskdrivefromthevolumegroup？（）

A.chvg
B.rmdev
C.reducevg
D.exportvg

单项选择题Asystemadministratorwouldliketorenamevolumegroupoldvgtonewvg.Thisvolumegroupresidesonhdisk1.Whatistheappropriateproceduretoperformthis？（）

A.reboot the server in maintenance mode；migratevg -y newvg oldvg；reboot the server in normal mode
B.unmount all filesystems in the volume group；varyoffvg oldvg；migratepv -y oldvg -n newvg  varyonvg newvg
C.unmount all filesystems in the volume group；varyoffvg oldvg；exportvg oldvg；importvg -y newvg hdisk1；mount all
D.unmount all filesystems in the volume group；varyoffvg oldvg；for each logical volume in the volume group do cplv -v oldvg -y newvg；varyonvg newvg；mount all

单项选择题Whichcommandisusedtolistinformationabouteachphysicalvolumeinvolumegrouptestvg？（）

A.lsvg -p testvg
B.lspv -v testvg
C.lslv -l testvg
D.lsattr -v testvg

单项选择题Whichcommandwouldanadministratorusetolistwhichfilesystemsareinvolumegroupdatavg？（）

A.lspv datavg
B.lslv -a datavg
C.lsfs -v datavg
D.lsvg -l datavg

单项选择题Asystemadministratorhasbeenaskedtomigratethedev_vgvolumegroupfromserverAtoserverB.Thedev_vgvolumegroupcontainsasinglefilesystemnamed development .Toprepareformigration，whichofthefollowingisthecorrectsequenceofcommandsforremovingthevolumegroupfromserverA？（）

A.exportvg dev_vg； umount /development； varyoffvg dev_vg
B.varyoffvg dev_vg； umount /development； exportvg dev_vg
C.umount /development； exportvg dev_vg； varyoffvg dev_vg
D.umount /development； varyoffvg dev_vg； exportvg dev_vg