Spectra T950 - Page 301

Chapter 9 — Configuring and Using Media Lifecycle Management Using PostScan
November 2016 User Guide—Spectra T950 Library
301
Cartridge Scanning
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199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move d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activa tedwhileFullScanisrunning.You
mustfirstpausethe PostScanprocess (see
PausethePostScanProcesson
page307).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396).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.