SCSI Primary Commands - 2.pdf

18 July 2001 T10/1236-D Revision 207.2.6.4 Fibre Channel N_Port with World Wide Name checking target descriptor formatTargets addressed using their Fibre Channel N_Port with World Wide Name checking are identified using the targetdescriptor format shown in table 21.Table 21 — Fibre Channel N_Port with World Wide Name checking target descriptor formatBitByte7 6 5 4 3 2 1 00 DESCRIPTOR TYPE CODE (E2h)1 Reserved NUL PERIPHERAL DEVICE TYPE2 Reserved3 Reserved4 (MSB)LOGICAL UNIT NUMBER11 (LSB)12 (MSB)WORLD WIDE NAME19 (LSB)20 Reserved21 (MSB)22N_PORT23 (LSB)2427Reserved2831Device type specific parametersThe DESCRIPTOR TYPE CODE, PERIPHERAL DEVICE TYPE and NUL fields and the device type specific parameters aredescribed in 7.2.6.1.The LOGICAL UNIT NUMBER field specifies the logical unit with in the SCSI device addressed by the data in theN_PORT and WORLD WIDE NAME and fields that shall be the source or destination for EXTENDED COPY operations.The WORLD WIDE NAME field shall contain the port World Wide Name defined by the Physical Log In (PLOGI)extended link service, defined in FC-FS.The N_PORT field shall contain the FC-FS port D_ID to be used to transport frames including PLOGI and FCP-2related frames.NOTE 7 Use of N_PORT addressing restricts this target descriptor format to a single fabric.When the copy manager first processes a segment descriptor that references this target descriptor, it shall confirmthat the D_ID in the N_PORT field is associated with the World Wide Name in the WORLD WIDE NAME field. If theassociation cannot be confirmed, the EXTENDED COPY command shall be terminated because the target isunavailable (see 7.2.3). The copy manager shall track configuration changes that affect the D_ID value for theduration of the EXTENDED COPY commands. An application client generating the EXTENDED COPY commandsis responsible for tracking configuration changes between commands.dpANS SCSI Primary Commands - 2 (SPC-2) 53