Spectra T950 - Cleaning Partitions and Auto Drive Clean

Chapter 2 — Architecture Overview Library Partitions
November 2016 User Guide—Spectra T950 Library
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Cleaning Partitions and Auto Drive Clean
Overview Thecleaningpartitionprovidespermanentstorageforcleaning
cartridgesinsidethelibrarywhentheAutoDriveCleanfeatureisenabled.
Thisspecial‐purposepartitiondoesnothaveanentry/exitpoolorany
drivesassociatedwithit.Asinglecleaningpartitioncanbesharedby
multiplestoragepartitions.
AutoDriveCleanusesthecleaningcartridgesinthecleaningpartitionto
providelibrary‐basedcleaningofdriveswithminimaluserintervention.
Automateddrivecleaningresultsinfewerfailedtaperead/write
operationsandisthepreferredmethodforcleaningdrives.
DrivesinapartitionwithAutoDriveCleanenabledarecleanednomore
thanonceinany12hourperiod.ThelibrarypostsamessageifanAuto
DriveCleandoesnotoccurbecauseofthe12hourrestriction.Ifyouwant
tocleanthedriveimmediately,youcaninitiateamanualcleaning.
Note: Software‐initiateddrivecleaningoperationscannotusethe
cleaningcartridgesstoredinacleaningpartition;thecartridges
arenotaccessibletothestoragemanagementsoftware.
Requirements TheAutoDriveCleanfeaturerequiresacleaningpartition
tobeassociatedwiththestoragepartitionsthatcontainthedrivesyou
wanttoclean.Cleaningpartitionsarecreatedseparatelyandthenassigned
tooneormorestoragepartitions(seeCreatingaCleaningPartitionon
page187andAllocateChambersandDrivesonpage197).
Thecleaningcartridgesusedinacleaningpartitionmustbestoredinspecially
labeledMaintenanceTeraP ackmagazines.Thecartridgesthemselv esmustbe
identifiedwith“CLN”atthebeginningofthebarcodese quenceontheir
labels.Thelibraryprev entsyoufromimportingcleaningcartridgesand
magazinesthatarenotproperlylabeledintoaclea ningpartition.
Auto Drive Clean Operation Thedrivesthatareinastoragepartitionwith
anassociatedcleaningpartitionarecleanedautomaticallywhencleaningis
required.Whena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notifiesthehostthattheSCSImovecommandforthe
unloadeddatacartridgeiscomplete.Thelibrarythenpostsasystem
messagethatthecleaningwassuccessful.
Inadditiontoautomaticcleaning,youcanusetheBlueScaleuserinterface
toinitiateamanualcleaningoperationusingacleaningcartridgestoredin
thecleaningpartition.Onlydrivesinastoragepartitionthathasan
associatedcleaningpartitioncanbecleanedusingthismethod.