Which command is used to list information about each physical volume in volume group 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

单项选择题WhenisitappropriatetouseaJFSfilesysteminsteadofaJFS2filesystem？（）

A.When the filesystem will contain 100GB files.
B.When the filesystem resides on a 32-bit system.
C.When the filesystem contains a large number of small files.
D.When filesystem compression is required due to limited disk space.

单项选择题Asystemcontainsmultiplehot-swapstand-alonediskswithalargenumberofJFS2filesystems.WhichfeatureofJFS2canbeusedtoimprovereliability，availabilityandserviceability（RAS）ifadiskfailureoccurs？（）

A.Inline logging
B.Dynamic inode allocation
C.Linear directory organization
D.Online filesystem defragmentation

单项选择题Asystemadministratorhasafilesystemcalled test datainvolumegroupdatavg.Whichofthefollowingcommandswillallowtheadministratortocreateamirroredcopyofthefilesystem’sdata？（）

A.chfs
B.chlv
C.mklvcopy
D.mkfscopy