User Manual

SCSI Commands Reference Manual, Rev. J 491
www.seagate.com Parameters for direct access devices
Identification Descriptor field
Each IDENTIFICATION DESCRIPTOR (see table 460) contains information identifying the logical unit, physical device, or access path used by the
command and returned parameter data.
PROTOCOL IDENTIFIER field
The PROTOCOL IDENTIFIER field may indicate the SCSI transport protocol to which identification descriptor applies. If the ASSOCIATION field
contains a value other than 1h or 2h or the PIV bit is set to zero, then the PROTOCOL IDENTIFIER field should be ignored. If the ASSOCIATION
field contains a value of 1h or 2h and the PIV bit is set to one, then the PROTOCOL IDENTIFIER field shall contain one of the values shown in
table 461 to indicate the SCSI transport protocol to which identification descriptor applies.
CODE SET field
The CODE SET field specifies the code set used for the identifier field, as described in Table . This field is intended to be an aid to software that
displays the identifier field.
Table 460 Identification Descriptor
Bit
Byte
7 6 5 4 3 2 1 0
0 PROTOCOL IDENTIFIER CODE SET
1 PIV Reserved ASSOCIATION IDENTIFIER TYPE
2 Reserved
3 IDENTIFIER LENGTH (n – 3)
4
IDENTIFIER. . .
n
Value Description
0h
Reserved
1h
The IDENTIFIER field shall contain binary values
2h
The IDENTIFIER field shall contain ASCII graphic codes (i.e., code values 20h through 7Eh)
3h - Fh
Reserved