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Page Length
110
The length (in bytes) of the Device Identification page. If the allocation length is too small to transfer all the page, the page
length is not adjusted to reflect the truncation.
Peripheral Qualifier and Peripheral Device Type
110
00h
A direct-access device (magnetic disc) is connected to this logical unit.
Each identification descriptor contains information identifying the logical unit. If the logical unit is accessible
through any other path, it returns the same identification.
Table 112: Identification Descriptor structure
Bit
Byte
0
1
Reserved
2
Identifier Length (n - 3)
3
(MSB)
4
:
n
Field definitions (listed alphabetically)
Table
number
Association
112
This field specifies the entity that the Identifier field is associated with.
00h
Associated with the addressed physical or logical device.
01h
Associated with the port that received the request.
02 - 03h
Reserved.
Code Set
112
This field specifies the code set used for the identifier field. This field is an aid to software that displays the identifier field.
00h
Reserved.
01h
The Identifier field contains binary values.
02h
The Identifier field contains ASCII graphic codes (i.e., code values 20h through 7Eh)
03 - 0Fh
Reserved
Identifier
112
This field contains the identifier as described by the Identifier Type, Code Set, and Identifier Length fields.
Identifier Length
112
This field specifies the length, in bytes, of the Identifier.
If the command descriptor block's allocation length is too small to transfer all of the identifier, the Identifier Length
Note.
is not adjusted to reflect the truncation.
Identifier Type
112
This field specifies the format and assignment authority for the identifier.
00h
No assignment authority was used and, consequently, there is no guarantee that the identifier is globally
unique (the identifier is vendor-specific).
01h
The first eight bytes of the Identifier field contain the Vendor ID. The organization associated with the Vendor
ID is responsible for ensuring that the remainder of the Identifier field is unique. One recommended method
Fibre Channel Interface Manual, Rev. D
7
6
Reserved
Reserved
5
4
Association
Identifier
3
2
Code Set
Identifier Type
1
0
(LSB)
177
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