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The IDENTIFY message is sent by either the initiator or the drive 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 4–2 shows the
format of the IDENTIFY message and Table 4–5 describes the data field contents.
Bit76543210
Identify DiscPriv LUNTAR Reserved LUNTRAN
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Identify The Identify bit must be set to 1. This identifies the message as
an IDENTIFY message.
DiscPriv Disconnect Privilege. The DiscPriv can be 0, provided that no
other I/O process is currently active in the drive. If not set to 1
and other I/O processes are currently active in the drive, the
drive returns BUSY status.
LUNTAR The Logical Unit/Target Routine (LUNTAR) field must be set to
zero. The drive supports a single Logical Unit Number (LUN 0 ).
A LUNTAR bit of one causes the drive to send a MESSAGE
REJECT message and switch to the BUS FREE phase.
Reserved The Reserved bits must be zero. If a Reserved bit is non-zero,
the drive returns a MESSAGE REJECT message and switches
to the BUS FREE phase.
LUNTRN Logical Unit Number.
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