User Manual

SCSI Commands Reference Manual, Rev. J 508

www.seagate.com Parameters for direct access devices

RELATIVE PORT IDENTIFIER field

The RELATIVE PORT IDENTIFIER field (see table 481) contains the relative port identifier of the SCSI port to which the SCSI port designation

descriptor applies.

INITIATOR PORT TRANSPORTID LENGTH field

The INITIATOR PORT TRANSPORTID LENGTH field indicates the length of the INITIATOR PORT TRANSPORTID field.

zero value indicates no INITIATOR PORT TRANSPORTID field is present (i.e., the SCSI port is not an initiator port).

non-zero value indicates a TransportID identifying the initiator port as defined in SPC-5.

TARGET PORT DESCRIPTORS LENGTH field

The TARGET PORT DESCRIPTORS LENGTH field indicates the length of the target port descriptors, if any. A TARGET PORT DESCRIPTORS LENGTH

field set to zero indicates no target port descriptors are present (i.e., the SCSI port is not a target port).

Each target port descriptor (see table 482) contains an identifier for the target port. The target port descriptors may be returned in any order.

PROTOCOL IDENTIFIER field

The PROTOCOL IDENTIFIER field indicates the SCSI transport protocol to which the designation descriptor applies as described in

table 482.

CODE SET field, PIV field, ASSOCIATION field, DESIGNATOR TYPE field, DESIGNATOR LENGTH field, and DESIGNATOR field

The CODE SET field, PIV field, ASSOCIATION field, DESIGNATOR TYPE field, DESIGNATOR LENGTH field, and DESIGNATOR field are

as defined in the Device Identification VPD page designation descriptor (see SPC-5), with the following additional requirements:

a) the PIV bit shall be set to one (i.e., the PROTOCOL IDENTIFIER field always contains a SCSI transport protocol identifier); and

b) the ASSOCIATION field shall be set to 01b (i.e., the descriptor always identifies a target port).

Table 481 Relative Port Identifier field

Code Description

0h Reserved

1h Relative port 1, historically known as port A

2h Relative port 1, historically known as port B

3h to FFFFh Relative port 3 through 65 535

Table 482 Target port Descriptor

Bit

Byte

7 6 5 4 3 2 1 0

0 PROTOCOL IDENTIFIER CODE SET

1 PIV (1b) Reserved ASSOCIATION (01b) DESIGNATOR TYPE

2 Reserved

3 DESIGNATOR LENGTH (n – 3)

DESIGNATOR. . .