Specifications

Storage Subsystem Guide 9
Understanding Tiered Storage
Thestorageserversupportstiersofstorage,whereeachtierismadeupof
deviceswithdifferent performancecharacteristicsortechnologies.
TiersofstorageandstoragevirtualizationarefullysupportedbyData
Migrator,anoptional featurewhichallowsyoutooptimizetheusageoftiered
storageandremoteNFSv3serversby
automaticallymigratingdataamong
storagesubsystemsofprimaryandsecondarystorage.Basedonuser‐defined
policies,DataMigratormonitorsfilemetadatasuchassize,type,durationof
inactivity,accesshistory,andsoon.Whenthecriteriaofapolicyaremet,Data
Migratormigratesfilesaccordingtorulesspecifiedin
thepolicyas
backgroundtaskswithminimalimpactonserverperformance.Fromthe
perspectiveoftheclientworkstation,primaryversussecondaryfilelocationis
transparent.NotethatDataMigratordoesnotsupportmigratingdatatoor
fromtape librarysystems.FordetailedinformationaboutDataMigrator,refer
totheSystemAdministration
Guide.
Fibre Channel
Fabric
TheserversupportsfabricFCswitches,andwhenconnectingtoaFCswitch,
theservermustbeconfiguredforN_Portoperation.SeveralFCSwitch
optionsareavailable,contactSGIGlobalServicesformoreinformationon
supportedswitches.
YoucanmanagetheFCinterfaceontheserver/clusterthroughthecommand
lineinterface
(CLI),usingthefollowingcommands:
•
fc-linktoenable/disabletheFClink.
•
fc-link-typetochangetheFClinktype.
•
fc-link-speedtochangetheFCinterfacespeed.
Formoreinformationaboutthesecommands,refertotheCommandLine
Reference.
About FC Paths EachstoragesubsystemcanbeaccessedthrougheitheroftwoavailableFC
paths.AnFCpathismadeupoftheserver’shostportID,thestorage
subsystemportWWN(worldwidename),andtheSDidentifier(ID).The
4Archival
SATAorSAS
7,200
5Long‐termstorage N/A(Tape) NA
Tier Performance DiskType DiskRPM