The /systest filesystem is associated with the /dev/testlv logical volume on the ’testvg’ volume group. Given this information， which of the following commands can the system administrator use to determine if the /systest filesystem is mirrored？（）

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