Table B-9: Parallel Interface T_L Target Descriptor Format - Spectra Logic Spectra S50 User Manual

Table B-8: N_Port with World Wide Name Checking Target Descriptor Format
Bit
Byte 7
24
27
28
31
The Descriptor Type Code, Peripheral Device Type and NUL fields and the device type
specific parameters are described in Target Descriptors on page 124.
The Logical Unit Number field specifies the logical unit with in the SCSI device
addressed by the data in the N_Port and World Wide Name and fields that will be the
target (source or destination) for EXTENDED COPY operations.
The World Wide Name field will contain the port World Wide Name defined by the
PLOGI extended link service.
The N_PORT field will contain the FC-PH port D_ID to be used to transport frames
including PLOGI and FCP-2 related frames.
When the copy manager first processes a segment descriptor that references this target
descriptor, it will confirm that the D_ID in the N_PORT field is associated with the
World Wide Name in the World Wide Name field. If the association cannot be
confirmed, the EXTENDED COPY command will be terminated because the target is
unavailable (see Errors Detected During Processing Segment Descriptors on page 120).
The copy manager will track configuration changes that affect the D_ID value for the
duration of the EXTENDED COPY commands. An application client generating the EXTENDED
COPY commands is responsible for tracking configuration changes between commands.
Parallel Interface T_L Target Descriptor Format
Targets addressed using their parallel SCSI bus Target ID and logical unit number are
identified using the target descriptor format shown in Table B-9.

Table B-9: Parallel Interface T_L Target Descriptor Format

Bit
Byte 7
0
1 Reserved
2
3
Appendix B. Extended Copy—83h—SPC2 Specifications
6 5 4
Device Type Specific Parameters
6 5 4
Descriptor Type Code (E3h)
NUL
128
3 2
Reserved
3 2
Peripheral Device Type
Reserved
Reserved
1 0
1 0