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Chapter 4 SCSI Commands

INQUIRY Command (12h)

DLT-S4 Interface Reference Guide 48

Relative Target Port Identifier 4

Figure 15 shows the format of the Relative Target Port Identifier.

Figure 15 Relative Target Port

Identifier — Data Format

Table 25 Relative Target Port

Identifier — Field Descriptions

Bit

Byte

7 6 5 4 3 2 1 0

0 Protocol Identifier Code Set (1)

1 PIV (1) Reserved Association (1) Identifier Type (4)

2 Reserved

3 Identifier Length (04h)

4 — 5 Obsolete

6 — 7 Relative Target Port Identifier

Field Description

Protocol Identifier The drive returns 0h if the protocol is Fibre Channel, 1h if the protocol is Parallel

SCSI, and 6h if the protocol is SAS.

Code Set Set to 1h, indicating binary data.

PIV Set to 1h, indicating that the value returned in the Protocol Identifier field is valid.

Association Set to 1h, indicating that the Identifier is associated with the port.

Identifier Type Set to 4h indicating this identifier is of type Relative Target Port.

Identifier Length Specifies the length in bytes of the Identifier field. If the Allocation Length field of

the CDB is too small to transfer the entire identifier, the Identifier Length value is

not adjusted to reflect the truncation.

Relative Target Port

Identifier

Value = 1 device has single port.

1 2 ... 77 78 79 80 81 82 83 84 85 86 87 ... 385 386

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