Quantum ATL SuperLoader ATL, User Manual

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Chapter 2 Messages
Supported SCSI Messages
Quantum ATL SuperLoader Software Interface Guide 15
Table 4 Response to
Disconnect Message
Identify (80h-FFh)
2
The IDENTIFY message is sent by either the initiator or the
SuperLoader to establish or re-establish the physical connection
path between an initiator and target for a particular logical unit
under the conditions listed below. Figure 2 shows the format of the
IDENTIFY message and table 5 describes the data field contents.
Figure 2 Identify
Message
BUS Phase SuperLoader Response
SELECTION The SuperLoader discards the DISCONNECT message and goes to BUS
FREE.
COMMAND The SuperLoader discards the DISCONNECT message and goes to BUS
FREE. The ATTENTION request is ignored while the Command Descriptor
Block is fetched. The SuperLoader does not switch to MESSAGE OUT until
the current DMA completes.
DATA The ATTENTION request is ignored while the current data transfer
completes; that is, the SuperLoader does not switch to MESSAGE OUT
until after the current DMA completes. The SuperLoader returns a
MESSAGE REJECT message and responds with CHECK CONDITION
status, indicating the command aborted because of an invalid message.
STATUS The SuperLoader sends a MESSAGE REJECT message, then sends
COMMAND COMPLETE.
MESSAGE IN The SuperLoader sends a MESSAGE REJECT message and switches to the
BUS FREE phase.
Bit 7 6 5 4 3 2 1 0
Identify DiscPriv LUNTAR Reserved LUNTRN