Sun Oracle Storage Tek T10000, Reference Manual

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E20425-01 • Chapter 3 Operations 19
Loop Initialization Features
Selective Reset
Selective resets perform a reset on the receiving port. These resets are helpful
for error recovery or reconfiguration of the loop. Any NL_Port that uses a
selective reset transmits a LIP(AL_PD,AL_PS).
• AL_PD field contains the address of the port being reset
• AL_PS contains the address of the port issuing the reset
Loop Failures
A loop failure is any of the following:
• A loss of Signal
• A loss of Synchronization for longer than R_T_TOV
If a Loop Failure occurs, the L_Port which detects the failure issues a
LIP(F8,AL_PS) if it has a valid AL_PA, or LIP(F8,F7) if it doesn’t.
Open Initializing State
The open initializing (OPEN-INIT) state performs the process of loop
initialization. When ports are in this state, initialization frames are transmitted
and received to identify the temporary loop master and to assign AL_PA
values. Entering this state assumes the loop is operational and sets the
Available BB_Credit equal to zero (0).
Loop Initialization Select Master
StorageTek tape drives support the process of selecting a Loop Initialization
Select Master (LISM) by using the device with the lowest PORT_NAME.
Note: If an FL_Port (fabric loop attachment) is present, it assumes the role of
LISM.
Loop Initialization Fabric Assigned Address
StorageTek tape drives support the process of Loop Initialization Fabric
Assigned (LIFA) addresses. This process is supported when the tape drive is
operating in Public Loop mode.
Loop Initialization Previously Acquired
StorageTek tape drives support the process of Loop Initialization Previously
Acquired (LIPA) addresses. This process is supported when the tape drive has
previously acquired an address.