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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.