Seagate Ultra160 Product Manual page 179

SCSI Interface Product Manual, Rev. B
[5] Each IDENTIFICATION DESCRIPTOR (see Table 93) contains information identifying the logical unit,
physical device, or access path used by the command and returned parameter data.
Table 93. Identification Descriptor
Bit
7
Byte
0
1 Reserved
2
3 Identifier Length [d]
4 (MSB)
n
[a] The CODE SET field specifies the code set used for the identifier field, as described in Table 94. This
field is intended to be an aid to software that displays the identifier field.
Table 94: Code Set
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
[b] The Association field indicates the entity that the Identification descriptor describes. If a physical or
logical device returns an Identification descriptor with the Association field set to 0h, it shall return the
same descriptor when it is accessed through any other path.
The Association field specifies the entity with which the Identifier field is associated, as described in
Table 95.
Table 95: Association
Value Description
0h The Identifier field is associated with the addressed physical or logical device
1h The identifier field is associated with the port that received the request
2h - 3h Reserved
6 5 4
Reserved
Association [b]
Identifier (n – 3) [e]
3 2 1
CODE SET [a]
Identifier Type [c]
161
0
(LSB)