Specifications

The SGI InfiniteStorage NAS Storage System

8 SGI InfiniteStorage NAS Server and Titan Server

Ifitisnecessarytoremoveandreplaceafaileddisk,somestoragesubsystems

support“hotswap”operations.Inahotswap,anofflineorfaileddiskis

removedandareplacementdiskisinsertedwhilethepowerisonandthe

systemisoperating.

Understanding Tiered Storage

Tieredstorageallowsyoutoconnectmultiplediversestoragesubsystems

behindasingleserver(orcluster).Usingtieredstorage,youcanmatch

applicationstoragerequirements(intermsofperformanceandscaling)to

yourstoragesubsystems.Thissectiondescribestheconceptoftieredstorage,

andexplainshowtoconfigurethestorageserver

toworkwithyourstorage

subsystemstocreateatieredstoragearchitecture.

EachserversupportsuptoeightFCports,independentlyconfigurablefor

either1‐,2‐or4‐gigabitoperation.Independentconfigurationallowsyouto

connecttoarangeofstoragesubsystems,whichallowsyoutochoosethe

configuration

thatwillbestmeetapplicationrequirements.Theserver

managesallback‐endstorageasasinglesystem,throughanintegrated

networkmanagementinterface.

Basedonastoragesubsystem’sperformance characteristics,itisclassifiedas

belongingtoacertaintier,andeachtierisuseddifferentlyintheenterprise

storagearchitecture.The

currentlysupportedstoragesubsystemsarefitinto

thetieredstoragemodelasfollows:

Tier Performance DiskType DiskRPM

1Veryhigh Dual‐portedFC

SAS

15,000

2High Dual‐portedFC 10,000

3Nearline

SATAorSAS

PATA

7,200