Spectra T950 - MLM PreScan and PostScan

Chapter 9 — Configuring and Using Media Lifecycle Management BlueScale Media Lifecycle Management
November 2016 User Guide—Spectra T950 Library
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Expired MLM-Enabled Cleaning Cartridges EachtimeanMLM‐enabled
cleaningcartridgeisusedinadrive,thedrivedecrementsthenumberof
cleansremainingonthecartridge.Whenthecartridgeisunloadedfromthe
drive,MLMreadsthenumberofcleansremainingfromthecartridge
MAM.Whenthenumberofcleansremainingreacheszero,thelibraryflags
thecartridgeasexpiredanddoesnotattempttousethecartridgeagain.
Becausethelibrarydoesnotneedtoloadacleaningcartridgeintoadriveto
determinethatitisexpired,cleaningfailuresduetoanexpiredcartridgeare
eliminated(assumingthecleaningpartitioncontainsagoodcleaning
cartridge).Informationaboutanexpiredcleaningcartridgeremainsinthe
MLMdatabaseevenafterthecartridge isexportedfromthelibrary.
Expired Non-MLM Cleaning Cartridges WhenMLMisnotenabledorifthe
cleaningcartridgesarenotMLM‐enabled,thelibrarymustloadthe
cleaningcartridgeintoadrivetodeterminewhetheritisexpired.Whenan
expiredcleaningcartridgeisloadedintoadrive,itisimmediatelyejected;
thecleaningfails.Thelibraryflagsthecleaningtapeasexpiredinthe
cartridgeinventoryandgeneratessystemmessagestonotifyyouofthe
expiredcleaningtapeandthefaileddrivecleaning.Thelibrarydoesnot
attempttousetheexpiredcartridgeforsubsequentcleanings.
Thelibrarydoesnotstoreanyinformationaboutnon‐MLMcleaning
cartridgesintheMLMdatabase.Thelibraryretainstheinformationabout
anexpiredcleaningcartridgeforaslongasitremainsinthelibraryoruntil
thelibraryispower‐cycled.Ifanexpirednon‐MLMcartridgeisexported
andthenreimportedintothelibrary,thecartridgemustbeloadedintoa
driveinordertoidentifyitasexpired.
MLM PreScan and PostScan
Overview MLMPreScanandPostScanareconfigurablebackground
processesthatuseanLTO‐4orlatergenerationdrivetoprovidetwolevels
ofverificationforLTOdatacartridges.See
UsingPreScanonpage298and
UsingPostScanonpage299fordetailedinformationaboutconfiguring
andusingPreScanandPostScan.
Note: PostScanandSpectraSKLMencryptionkeymanagementcannot
beconfiguredforuseinthesamepartition.
Enable and Configure PreScan and PostScan BothPreScanandPostScan
areenabledandconfiguredaspartofthepartitioncreationprocess,as
describedinEnableandConfigureMLMPreScan andPostScanon
page199.Duringconfigurationyousetthescanningfrequencyandselect
thetypesofscanyouwanttouse.