A system contains multiple hot-swap stand-alone disks with a large number of JFS2 file systems. Which feature of JFS2 can be used to improve reliability， availability and serviceability （RAS） if a disk failure occurs？（）

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

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

单项选择题Asystemadministratorcancreatelogicalvolumesandthenaddfilesystemstothem，orcreatethefilesystemdirectly.Whatisanadvantageofthetwo-stepapproachinsteadoftheone-stepapproach？（）

A.The number of bytes per inode can be specified.
B.Placement of the filesystem on the disk can be specified.
C.The jfslog can be specified on creation of the filesystem.
D.Either a JFS or JFS2 filesystem can be created on the logical volume.

单项选择题Whichcommandlistsoutthephysicalvolumenamesaswellastotal freePPsinvolumegroupdatavg？（）

A.lsdev -Cl datavg
B.lsvpcfg datavg
C.lspv -p datavg
D.lsvg -p datavg

单项选择题Diskshdisk1andhdisk2areassignedtodatavg.Whichofthefollowingcommandsshouldbeusedtodeterminewhichlogicalvolumesarepresentonhdisk1？（）

A.lspv -l hdisk1
B.lsvg -l datavg
C.lslv -p hdisk1
D.lsattr -El hdisk1

单项选择题The$HOME .netrcfilecontainsinformationusedbytheautomaticloginfeatureofwhatcommand？（）

A.rsh
B.ftp
C.ssh
D.rlogin