Specifications

The SGI InfiniteStorage NAS Storage System
12 SGI InfiniteStorage NAS Server and Titan Server
ThefollowingtabledescribestheRAIDlevelssupportedbyeachofthe
currentlysupportedstoragesubsystems:
The SGI
InfiniteStorage
220 Storage
Controller
Enclosure
Astorageenclosurecontainingupto12SAS(SerialAttachedSCSI)orSerial
ATA(SATA)diskdrives.TheInfiniteStorage220isavailablewith15,000RPM
SASdiskdrives,aswellas7,200RPMSATAdiskdrives.Inthesubsystem,an
InfiniteStorage220storageenclosureservesasastoragecontrollerenclosure,
housing
upto12SASorSATAdisksanddualRAIDcontrollers.EachRAID
controllerhasdualRAIDhostports,and2FCdriveloops,and2Ethernet
ports.TheEthernetportsareusedtoconnecttotheenvironmentalsensor
modulesinthedriveshelfenclosures.
TheRAIDcontrollersinan
InfiniteStorage220storageenclosuresupporta
maximumof4enclosures,includingtheInfiniteStorage220storagecontroller
enclosureitself,andupto3driveshelfenclosures.
The SGI
InfiniteStorage
220 Drive Shelf
Expansion
Adriveshelfenclosure,whichcanbeconnectedtotheInfiniteStorage220
storageenclosure.Eachdriveshelfexpansionconsistsofanenclosurefitted
with12SASorSATAdisks,anddualenvironmentalsensormodules.
EachdriveshelfenclosuremustcontainallSASorallSATAdiskdrives;you
cannotmixSAS
andSATAdiskswithinadriveshelfenclosure.
Eachenvironmentalsensormodulehastwointerfaces,whichareusedto
LoopInandLoopOutofthestoragecontrollerenclosure.Wiringisroutedso
thatonepathleadstothefirstdriveshelfenclosureandtheotherpathleadsto
thelast
driveshelfenclosure.
Enclosure TypicallyusedinTier(s)
SGIInfiniteStorage220 Tier1,Tier2,andTier3
Thisenclosurehasseveral
configurations,andissuitableforuse
inseveraltiers,basedonconfiguration
oftheindividualstoragearray.
SGIInfiniteStorage15000 Tier1,Tier2,andTier3
Thisenclosurehasseveral
configurations,andissuitableforuse
inseveraltiers,basedonconfiguration
oftheindividualstoragearray.
Enclosure RAIDLevel(s)
Supported
SGIInfiniteStorage220 0/1/1+0/5/6
SGIInfiniteStorage15000 0/1/1+0/5/6