Spectra T50e - Page 251

Chapter 8—Configuring and Using Media Lifecycle Management Using PostScan
August 2017 User Guide—Spectra T50e Library
249
 IfeitherFullScanorQuickScanwithSpareDrivesisenabled,an
LTO‐4orlatergenerationGlobalSparedriveassignedtothepartition
mustbeavailable.
—OR—
IfQuickScanisenabled,anLTO‐4orlater generationdriveinthesame
partitionasthecartridgethatmetthePostScantriggercriteriais
available.
PostScan Cartridge Processing IfthePostScanprerequisitesaremet,the
libraryinsertsthefirstcartridgeinthePostScanqueueintoanavailable
drive.ThecartridgesinthePostScanqueueareprocessedonaFirstIn,
FirstOut(FIFO)basis.DependingonthePostScanoptionselectedforthe
partition,thedriveloadsthecartridgeandbeginsoneofthefollowing
operationstocheckformediaerrors.
Notes:  PostScanreadsthedataonthetapebutdoesnotprocessthis
dataintoausableform.Itsimplyverifiesthatitcanreadthe
datafromthetape.
 SeeEnableandConfigureMLMPreScanandPostScanon
page177foradditionalinformationaboutthedifferences
betweentheFullScanandQuickScanprocesses.
This PostScan
option...
Uses...
FullScan AGlobalSparedriveassignedtothepartition.FullScanverifiesallofthedata
onthetape,fromthebeginningofthetape(BOT)totheendoftherecorded
data(EOD)orthephysicalendofthetape,whichevercomesfirst.
Notes:
 IfthepartitionusesLTO‐4drives,FullScanistheonlyavailableoption.
 AGlobalSparedrivemustbeassignedtothepartition.
 ThecartridgedoesnotappearontheBlueScaleinventoryscreenswhileitis
beingscanned.Ifthecartridgeisrequestedbythestoragemanagement
softwareitisimmediatelyejectedfromthedrivethatisperformingthe
verificationandmovedtothelocationrequestedbythestoragemanagement
software.Asystemmessage
ispostedtoindicatethattheFullScanoperation
wasinterrupted.ThecartridgeisreturnedtothetopofthePostScanqueue
andisthefirstoneprocessedafteritisreturnedtoitsslot.
 TheGlobalSparedrivecannotbeactivatedwhileFullScanisrunning.You
mustfirstpausethe PostScanprocess (see
PausethePostScanProcesson
page254).ThelibraryimmediatelyabortstheFullScancurrentlyinprogress
andreturnsthecartridgetoitsoriginallocation.Youcanthenactivatethe
GlobalSparedrive(see
UsingaGlobalSpareDriveonpage402).Theaborted
FullScanprocessresumeswhentheGlobalSparedriveisagainavailable.
 ThetimetocompleteaFullScandependsonthetypeandamountofdataon
thetapeandwhetheritwaswrittenusingfixed‐orvariable‐lengthblocks.
 UsingFullScanontapesthatarewrittenusingvariable‐lengthblocksizesis
notrecommended.