Sometimes performance is more important than availability （e.g.， in cases where the data can be easily re-created）. Which of the following is the appropriate disk configuration for an application that requires faster writes over availability？（）

单项选择题AsupportspecialiststartedtoapplyanAPARonasystembyinsertingthetapeintothetapedrive，andloadedthefixusingsmittyinstallp.Thefollowingerrormessageisdisplayed： tapenotinbackupformat Whichofthefollowingwillresolvethisproblem？（）

A.Change density setting to 2
B.Set tape device to /dev/rmt0
C.Set block size to 0 for variable
D.Enable compression on tape device

单项选择题Auserhasusedalloftheallowedlogonattemptsfortheuserid.Whichcommandcanbeusedtoresettheunsuccessful_login_countto0forthatuser？（）

A.usrck
B.chsec
C.chuser
D.passwd

单项选择题WhichofthefollowingisthedefaultaccesscontrollistfilefortheResourceManagementandControl（RMC）subsystem？（）

A./var/rmc/ctrmc.acls
B./etc/ctrmc/rsct.acls
C./etc/security/rsct.acls
D./usr/sbin/rsct/cfg/ctrmc.acls

单项选择题Asystemadministratorissuedtheerrptcommandandhadnoresults.Thesystemadministratordeterminedthaterrorloggingwasturnedoff.Whichofthefollowingcommandsshouldbeusedtostartloggingsystemerrors？（）

A./usr/bin/errmsg
B./usr/lib/errdemon
C./usr/lib/errlogger
D./usr/bin/errinstall

单项选择题Asystemadministratorhasatwo-diskvolumegroup（testvg）withonelogicalvolume（testlv）whichhasjustbeenmirroredacrossbothdiskdrives.Whichofthefollowingcommandscanbeusedtoturnoffquorum？（）

A.chvg -Qn testvg
B.chlv -Qn testlv
C.varyoffvg testvg； varyonvg -Qn testvg
D.varyoffvg testvg； exportvg testvg； importvg -Qn testvg； varyonvg testvg