Spectra T950 - Page 73

Chapter 2 — Architecture Overview Fibre Channel Connectivity
November 2016 User Guide—Spectra T950 Library
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Partitions Using Direct-Attached Fibre Channel Drives
WhenapartitionincludesFibreChanneldrives,thedrivesareconnected
directlytothehostusingaFibreChannelarbitratedlooporfabric.
Figure33onpage69isasimplerepresentationofhowtheroboticsand
direct‐attachedFibreChanneldrivesareconnecteddirectlytoaFibre
ChannelSANthroughaswitchorhub.
World Wide Names for Fibre Channel Drives Aspartofprovidingnetwork
connectivity,thedrivesledfirmwareassignsalocation‐basedWWNfor
thedriveithouses.ThisWWNisdisplayedontheDriveDetailsscreenand
canbeusedbythehostsoftwaretoaddressthedrive.BecausethisWWNis
location‐based,itremainsconstantevenifadriveisreplacedbyadifferent
oneofthesametype.Thenewdriveassumesthelocation‐basedBlueScale
identifierandWWN.
Note: TheWWNdisplayedontheDriveDetailsscreenisactuallythe
WWPNforportAonthedrivesled.TheWWPNforportBisthe
sameastheoneforportAexceptthattheseconddigitfromthe
leftis2insteadof1.
Figure 37 The WWN assigned to a Fibre Channel drive.