Spectra T50e - PREPARING TO CONFIGURE PARTITIONS

Chapter 6—Configuring and Managing Partitions Partition Overview
August 2017 User Guide—Spectra T50e Library
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Cleaning Partitions and Auto Drive Clean
Cleaning Partition Overview Acleaningpartitionprovidespermanent
storageforcleaningcartridgesinsidethelibrary.Thisspecial‐purpose
partitionisonly usedwhenAutoDriv eCleanisenabledforoneormore
storagepartitionsandcan besharedbymultiplestoragepartitions.The
cleaningpartitiondoesnothaveanydrives associatedwithit.
ConfiguringacleaningpartitiondoesnotrequireanSLSactivationkey;
nordoesacleaningpartitioncountagainstthefourpartitionmaximumfor
thelibrary.Iffew erthanthephysicallypresentcartridgestorageslotsare
licensedwithaCapacityOnDemand(CoD)key,thecleaningpartitionuses
anycartridgeslotsthatarenotlicensed.Theslotsassignedtothecleaning
partitiondonotcountagainstthelicensedcapacity.Ifallofthephysically
presentslotsarelicensed,thecleaningpartitioncanuseanyslotsthatarenot
alreadyassignedtoanotherpartition.
Auto Drive Clean Functional Overview AutoDriveCleanusesthecleaning
cartridgesstoredinthecleaningpartitiontoprovideautomatic,library‐
basedcleaningofLTOdriveswithoutuserintervention.Automateddrive
cleaningresultsinfewerfailedtaperead/writeoperationsandisthe
preferredmethodforcleaningdrives.SeeCleaningCartridgeTrackingon
page230forinformationabouthowMediaLifecycleManagement(MLM)
managesthecleaningcartridgesinthecleaningpartition.
Note: Drivecleaningoperationsthatareinitiatedbythestorage
managementsoftwarecannotusethecleaningcartridgesstored
inacleaningpartition;thecartridgesarenotaccessibletothe
storagemanagementsoftware.
Whenthedriveisunloadedinresponsetoahostrequestandthedata
cartridgeismovedtoitsstoragelocation,thelibraryqueriesthedriveto
determineifitneedscleaning.Ifcleaningisrequired,thelibrarydelays
notifyingthehostthattheSCSImovecommandfortheunloadeddata
cartridgeiscompletewhileitperformsanautomaticdrivecleaning.
Duringthedelay,thelibraryretrievesacleaningcartridgefromthe
cleaningpartitionandinsertsitintothedrive.Whenthecleaningis
complete,thelibraryreturnsthecleaningcartridgetothecleaning
partitionandthennotifiesthehostthattheSCSImovecommandforthe
unloadeddatacartridgeiscomplete.
Automaticcleaningofdrivesdoesnotoccurmorethanonceinany12hour
period.Ifthenextdatacartridgeload/unloadcycleoccurswithinthis
12hourwaitingperiod,acleaningisnotattemptedunlesstheprevious
cleaningattemptfailedduetoanexpiredcleaningcartridge.Whena
cleaningfails,thecleaningisreattemptedthenexttimethehost unloadsa
datacartridgefromthedrive ifthecleaningpartitioncontainsagood
cleaningcartridge.Ifyou
wanttocleanthedriveimmediatelyafteryou
receivethenotificationthatacleaningfailed,youcaninitiateamanual
cleaning(see
ManuallyCleaningaDriveonpage439).