Which commands will list all the logical volumes and the file system distribution across a specific physical volume of the following？（）

单项选择题Asystemadministratorhasaserverexperiencingperformanceproblemswithlogicalvolumeswithinaparticularvolumegroup.WhichcommandcanreportI Ostatisticsforlogicalpartitionswitheachlogicalvolumewithinthevolumegroup？（）

A.lslv
B.lsvg
C.iostat
D.lvmstat

单项选择题The systestfilesystemisassociatedwiththe dev testlvlogicalvolumeonthe’testvg’volumegroup.Giventhisinformation，whichofthefollowingcommandscanthesystemadministratorusetodetermineifthe systestfilesystemismirrored？（）

A.df
B.lsvg
C.lsfs
D.lsdev

单项选择题The systestfilesystemisassociatedwiththe dev testlvlogicalvolumeonthetestvgvolumegroup.Thetestvgvolumegroupisassignedtophysicalvolumeshdisk2andhdisk3.Whichcommandcanthesystemadministratorusetodetermineifthe systestfilesystemismirrored？（）

A.df
B.lslv
C.lsfs
D.lsdev

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