Sun Microsystems Virtual Tape Library Manuel d'utilisateur télécharger pdf (Page 122)

Managing tapes

108 VTL User Guide • May 2008 G • 96267

■ copyaphysicaltapetoavirtualtapethatemulates thesametypeofmedia

■ directlyaccessaphysicaltapewithoutcopyingtheentiretape

■ recycleaphysical tapeafterimportingitscontentstovirtualmedia

■ movedatafromavirtualtapetoaphysicaltapeofthesamemediatype

VTLimport/exportcapabilitiesareparticularlyusefulwhenyouarenot usingthe

AutomatedTapeCachingfeatureandwanttomovetapesfromavirtuallibraryto

physical mediaforlongtermstorag e. Should yousubsequentlyneed

torecoverfiles,

youcanaccessthephysicaltapevolumedirectly,inthephysicallibrary,byusingthe 

VTLimpo rtfunction.Thisgivesthebackupapplicationimmediateaccessto thetape

datawithoutwaitingforacompletecopy—abigadvantage when youneedto

restoreonlyasmallamountofdata.

Youshouldnote,however,thatVTLsoftwaresup portsseveralofwaysofmoving

datafromvirtualto phy si c al storage,eachofwhichhasadvantagesinparti cula r

situations. InadditiontoVTL’sexportfunction,eachofthefollowingmethods

supportsmigrationofdatafromvirtualtophysicalmedia:

■ copying virtualtapetophysicaltapeusingthe functionalityprovidedbyyour

backuporcopy‐/vault‐managementapplication

■ automaticallycloningvirtualvolumestophysicalmedia aftereachbackupusing

theVTLAutoArchivefunction

■ automaticallycloningvirtualvolumestophysicalmedia usingthepolicy‐driven

VTLAutomatedTapeCachingoption.

Youshouldthusconsideryouroptionsbeforedeciding onamethod.Automated

TapeCac hi n g and AutoArchivecannotbeusedtogether.

Upto32import/exp ortjobscanrunconcurrently,although,inpra ctice ,thisis

generally

limitedtosomethinglessbythenumberofph y si cal tapedrivesavailable

ontheattachedlibrary.

Thissection holdsinstructionsforthefollowingtasks:

■ “Importinga phy si c al tapeintoavirtualli brary” onpage 109

■ “ImportingcartridgesinanIBMiSeriesenvironment”onpage 115

■ “Exportingvirtualtapetophysicaltape”onpage 115

■ “ExportingcartridgestothevirtualvaultinanIBMiSeriesenvironment”on

page 119.

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Sun Microsystems Virtual Tape Library Manuel d'utilisateur Page 122