Chapter 9 — Configuring and Using Media Lifecycle Management Using PostScan
November 2016 User Guide—Spectra T950 Library
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Cartridge Scanning
IfthePostScanprerequisitesaremet,thelibraryinsertsthefirstcartridge
inthePostScanqueueintoanavailabledrive.Thecartridgesinthe
PostScanqueueareprocessedonafirst‐in‐first‐out(FIFO)basis.
DependingonthePostScanoptionselectedforthepartition,thedrive
loadsthecartridgeandbeginsoneofthefollowingoperationstocheckfor
mediaerrors.
Notes: PostScanreadsthedataonthetapebutdoesnotprocessthis
dataintoausableform.Itsimplyverifiesthatitcanreadthe
datafromthetape.
SeeEnableandConfigureMLMPreScanandPostScanon
page199foradditionalinformationaboutthedifferences
betweentheFullScanandQuickScanprocesses.
This PostScan
option...
Uses...
FullScan AGlobalSparedriveassignedtothepartition.FullScanverifiesallofthedata
onthetape,fromthebeginningofthetape(BOT)totheendoftherecorded
data(EOD)orthephysicalendofthetape,whichevercomesfirst.
Notes:
IfthepartitionusesLTO‐4drives,FullScanistheonlyavailableoption.
AGlobalSparedrivemustbeassignedtothepartition.
ThecartridgedoesnotappearontheBlueScaleinventoryscreenswhileitis
beingscanned.Ifthecartridgeisrequestedbythestoragemanagement
softwareitisimmediatelyejectedfromthedrivethatisperformingthe
verificationandmove dtothelocationrequestedbythestoragemanagement
software.Asystemmessage
ispostedtoindicatethattheFullScanoperation
wasinterrupted.ThecartridgeisreturnedtothetopofthePostScanqueue
andisthefirstoneprocessedafteritisreturnedtoitsslot.
TheGlobalSparedrivecannotbeactiva tedwhileFullScanisrunning.You
mustfirstpausethe PostScanprocess (see
PausethePostScanProcesson
page307).ThelibraryimmediatelyabortstheFullScancurrentlyinprogress
andreturnsthecartridgetoitsoriginallocation.Youcanthenactivatethe
GlobalSparedrive(see
UsingaGlobalSpareDriveonpage396).Theaborted
FullScanprocessresumeswhentheGlobalSparedriveisagainavailable.
ThetimetocompleteaFullScandependsonthetypeandamountofdataon
thetapeandwhetheritwaswrittenusingfixed‐orvariable‐lengthblocks.
UsingFullScanontapesthatarewrittenusingvariable‐lengthblocksizesis
notrecommended.