Sun Oracle Storage Tek T10000, Справочное руководство

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Loop Initialization Features
20 T10000: Interface Reference Manual • January 2011 • E20425-01
Loop Initialization Hard Assigned
StorageTek tape drives support the process of Loop Initialization Hard
Assigned (LIHA) addresses. This process is supported when the tape drive is
first powered on and a configuration parameter enables it.
Loop Initialization Soft Assigned
StorageTek tape drives support the process of Loop Initialization Soft
Assigned (LISA) addresses. This process is supported when the hard
assigned address has been used by a different device or hard assigned
addressing is disabled.
Loop Initialization Report Position
StorageTek tape drives support the mapping process to build a map of the
AL_PA values according to their position on the loop. The temporary loop
master begins the procedure to create a Loop Initialization Report (LIRP).
This initialization report and map is done by using a 1-word frame identifier
with an offset value of one (1). As the frame is transmitted around the loop, the
next NL_Port increments the offset by a value of one and stores the
information in the AL_PA map.
Loop Initialization Loop Position
StorageTek tape drives support the process of Loop Initialization Loop Position
(LILP) by retransmitting this sequence when required.
Failure to Obtain a Loop Address
If an NL_Port is unable to obtain an address (fabric assigned, previously
assigned, hard assigned, or soft assigned) it goes into a non-participating
mode and immediately implicitly logs out all logged in ports.
If an NL_Port experiences a power-on reset, or recognizes a
LIP(AL_PD,AL_PS) it is not required to retain a previously acquired address to
use during the next loop initialization.
Private Loop Initialization Completion
At this point in loop initialization a private loop tape device has completed
initialization. It has acquired a private loop address of “00 00 xx.” The xx is its
assigned AL_PA.
The tape drive now waits for initiators, on this loop only, to complete a Port
Login (PLOGI), a Process Login (PRLI), and then to start executing tape
commands.