Sun Oracle Storage Tek T10000, Справочное руководство

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E20425-01 • Chapter 3 Operations 21
Loop Initialization Features
Public Loop Initialization Completion
The public loop tape device has now acquired a loop address of “00 00 xx” at
this point in initialization, where xx is its assigned AL_PA.
Next the tape drive will attempt a Fabric Login (FLOGI) with the loop FL_Port. If
the login is not successful, the tape drive will revert back to private loop
operation, see the Private Loop Initialization Completion description.
With the successful completion of the FLOGI, the tape drive has now acquired
its public loop address “DD AA xx.” Where DD is the fabric domain, AA is the
fabric area, and xx is the AL_PA.
The tape drive then attempts to Port Login (PLOGI) with the fabric directory
server to register with an RFC-4 request with the name service.
The tape drive now waits for initiators, on either this loop or fabric attached, to
complete a Port Login (PLOGI), a Process Login (PRLI), and then to start
executing tape commands.
Fabric F_PORT Attachment Initialization
In the absence of a loop environment the StorageTek tape drives will attempt to
initialize with a fabric. This is accomplished by doing a Fabric Login (FLOGI).
The FLOGI process will be attempted in each class of service that the tape drive
supports.
Once the FLOGI process is successful the tape drive will attempt to login
(PLOGI) with the fabric attached name server, if it exists. This process allows
the tape device to register its presence with the name server such that other
initiators may query the name server to find target tape drives to use.
The tape drive now waits for initiators on the fabric to complete a Port Login
(PLOGI), a Process Login (PRLI), and then to start executing tape commands.